Tips and hacks for crowdfunding a startup on KickStarter or Indiegogo?

What are some tips to garner attention for your project on crowdfunding platforms like Indiegogo and Kickstarter?

From browsing the most funded campaigns, the common elements seem to be:

• Great promo video (which would likely be expensive to make)
• Press mentions on tech blogs like TechCrunch (which is very hard to get unless your campaigns is already gaining momentum).

• Don't do a $1 pledge level. The absolute minimum should be $5. Anyone who can pledge $1 just to give you a 'go for it' vote of support can pledge $5.

• Build your audience before you do kickstarter. Projects starting from absolute scratch generally do not do well. You need people to help give your project an initial attention boost, and you need to make sure the pump will be primed with some initial funding -- people don't contribute to empty tip jars.

• Connect with the community around kickstarter. Game developers get a boost if they use a platform that was also funded on kickstarter, and post in that communities forums about their game. Artists get a boost when promoted by other artists funded through kickstarter. Everyone gets a boost when promoting their project in kickstarter-interested communities like /r/kickstarter.

• Read what else is out there. BrightJourney people can give some good advice, but there's a ton of interviews with successful kickstarter creators that are easily Googleable.

While I haven't done a Kickstarter campaign myself, here is what I've heard from others' experiences:

• Work on the campaign well before you actually start it on Kickstarter. Create the assets (teaser site, video, etc) well in advance and begin generating interest (and collecting emails).

• Figure out your target audience. Get as granular as possible. Once you understand who you are selling to, all your marketing (message, assets) should be geared towards them. Selling to a generic audience never results in customers who love what you do.

• Figure out concrete numbers for the amount of funding you need to build and deliver the product. Use that as the campaign minimum.