I haven't done it, but I have friends who have with varying degrees of success. The ones who made the most posted on social media and let their IRL friends and family know about it and had a good story or reason of what they will use the money for.
The sites have you set up thank you gifts at different constitution tiers. Can be as simple as a thank you card or if you offer a service, a complementary service (example, photo session or custom pony).
You can set it to take the money whether or not you reach your goal , and I forget specifics but they will take a bigger portion of your donations depending on how you choose to receive your funds.
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