[thesingularity]

Here is my advice, if you are a programmer/developer/hacker

Once you become passionate about a new project, force yourself "Not To Start Development" on it for one entire month. In this one month, you will dedicate yourself to doing marketing research for the project - checking competitors, contacting potential customers, figuring out how to acquire customers (and how costly customer acquisition will be). If at the end of one month, you still find yourself passionate about the idea and find it feasible with respect to the market research done, by all means, jump in with both feet.

Why do this? I am a hacker at heart and I love to get my hands dirty building things. This makes me invest time in projects that have no future and should not be worked on. Forcing myself not to work on any idea I get for a month, ensure that I give my time to only worthy projects.