Before your campaign starts, find a bunch of users who have been waiting for you to release your product. Tell them that you are about to do so on Kickstarter, and that because they have been waiting, you will tell them when it goes live, because there are a limited number of special discounts (e.g. 25% off) for those who have been waiting from before the campaign. Point out that these are available on a first come, first serve basis so that they should grab them as soon as you tell them the campaign is live, because otherwise others might grab them and there won't be enough.
Now you have just developed a cadre of people who will act quickly, as soon as you go live. Set your "threshold" so as soon as you sell out this limited edition, you will already have achieved your threshold. With this strategy, chances are that you will have achieved your threshold in the first few days because of the existing pent-up demand. And now that you hit your threshold so quickly, follow on backers know that your campaign WILL be funded, AND you will likely be on the front page and a media darling for your quick adoption.
If you launch without already having secured sufficient pent up demand in advance, your campaign will likely fizzle. Kickstarter is a place to monetize existing unsatisfied demand, but not so good at building that demand.