Although we hear of wildly successful crowdfunding campaigns, the truth is that the majority of these campaigns fail. The leading reward-based crowdfunding site, Kickstarter, has a 37 percent success rate and Indiegogo’s is even lower. And those cool hardware projects that seem to just take off and get immediate traction with backers? Don’t be fooled: 70 percent of the hardware projects that raise over $100,000 on Kickstarter and Indiegogo add venture or angel investments before launching their campaigns.

Related: 6 Trends That Are Shaping the Future of Crowdfunding

These entrepreneurs' inability to get traction with backers did not necessarily occur because their products were unappealing. More often than not, the key reason a project fails to meet its goal is that the VC owner underestimated the amount of time and cost that would be required to properly market that campaign.

The need for a marketing budget, then, is not just for reward-based campaigns; it applies to investment-based crowdfunding campaigns, as well.

While top equity platforms promote the thousands of registered investors they have on their sites just waiting to discover the Next Big Thing, most of those platforms have criteria and costs for actually marketing a deal to those same investors.

But, remember, there's a price tag for getting highlighted in that platform’s weekly email, or being promoted to its social media followers or featured in its webinars. To gain visibility to investors, an entrepreneur must have marketing dollars ready to commit or at the very least a willingness to surrender (sometimes substantial) equity or warrants in his or her venture to the platform owners.

So, how, exactly, do you maximize your marketing efforts? Here are five tips:

1. Don’t launch without a budget.

While much can be done for free, like sharing your campaign via your social media channels, emailing your friends and family or hosting offline meetups or launch parties, the most successful campaigns still incur costs. From shooting a video, to buying Facebook ads, to launching a PR campaign and even hiring a graphic designer, many crowdfunding campaigns invest a minimum of $20,000. With almost 6,000 active projects competing at any one time on Kickstarter, these campaigns need to to invest in ways that help them look polished and get noticed.

2. Ensure that your vendors have experience with the type of campaign being launched.

Investing in a campaign manager or marketing expert doesn’t always mean success. Take the case of Simon Thomson of social app Source. Despite extensively researching and interviewing PR and crowdfunding agencies to give his campaign the best possible chance,Thomson spent $20,000 with a well-known crowdfunding PR agency, only to be greatly disappointed in its work. “Quite quickly into the first three months of working with this agency," Thomson said, " we understood that the claims made about greatly increasing our social media presence on various platforms and having strong press relationships were false."

Simon said he also discovered that the PR group was uncreative and unresponsive when faced with challenges or requests to help the campaign get back on track. So, the lesson here is, when selecting a PR or marketing firm, be sure that it’s not only creative but able to support the specific type of campaign you are launching (sports, film, tech product, service, etc).

Related: Crowdfunding Nearly Tripled Last Year, Becoming a $16 Billion Industry

Since crowdfunding has become synonymous with pre-ordering a product, make sure that if your campaign is not product focused, any company you work with has experience that aligns with your particular campaign type and industry sector.

3. Understand who does the heavy lifting.

Many of the companies using crowdfunding today are actually organizations with their own substantial PR and marketing budgets -- as well as a full back-office support staff of internal PR people, marketing experts and financial backers fueling and helping their campaign.

Given this reality, you should clarify with any potential marketing vendor what it actually contributed to any campaigns it cites as examples of its past success. Review the vendor's press contacts and ask to interview previous clients to ensure that the success it's touting resulted from that vendor's own efforts rather than the work, staff and budgets of the companies behind those successful campaigns.

4. Make sure your copy has the appropriate call to action.

Although you may successfully drive traffic to your campaign, what's key is to convert those viewers to backers. Simon's app Source had 10,000 visits to its campaign page yet still had issues converting visitors to backers because its copy had not been drafted with the appropriate calls to action to encourage contributions.

Although Source's original campaign for $25,000 succeeded, the company had hoped to raise well beyond this sum and ended up launching a second campaign to meet its capital needs -- this time, however, without the marketing budget it had previously lost on a nonperforming vendor.

5. Strive to gain early momentum.

One key to a successful crowdfunding campaign is to gain early momentum. Most platforms indicate that project owners should attract the first 30 percent of their support from their own networks before turning to PR. Then, the first three days of any subsequent campaign are crucial.

At this juncture, founders should send a project-preview link to their inner circle in advance of their campaign launch and be diligent about keeping in contact, so these supporters will contribute as soon as the campaign goes live. Founders should also rely on PR -- but not to drive backers the day they launch. Instead, the PR should be there to help entrepreneurs cross the chasm between the initial support they've had (from friends, family, and co-workers) and the supporters to whom they have no connection as yet.

If you're a founder contemplating crowdfunding, don't be misled by the handful of “hits" that seem to go viral and then easily amass thousands of supporters and funders. While any project can be successful, given the right combination of preparation and execution, any attempt you make to raise significant funds will most likely need a well-planned and funded marketing and PR campaign.

And, along the way, don’t forget to check those client references if you're hiring an outside firm.

Related: Every Hour, $87,000 Is Raised Through Crowdfunding