How to avoid backing a crowdfunding failure

TechCo:

It’s every backer’s nightmare. The ultra-cool bit of tech kit you crowdfunded, which is totally going to change your life in every conceivable way, has been hit by delays, silence, spec-alterations and missed backer rewards. Until, finally the company resurfaces in the comments to say that the money’s gone, the project has folded, and there is no product to launch.

So, how can you make sure that the product you back actually comes out, and that you’re not supporting the 1 project in 10 that doesn’t deliver?

I’ve been burned by a couple of failed Kickstarters and have had several more fail to meet their goals. This article has some good ideas on how to make sure you don’t get ripped off.