Any time I invent a cool thing, I go and try and find it online. Usually it's already an established product, which totally validates my feeling that the thing I invented is cool and would be a good product. :D

Occasionally it's (as far as I can tell) a legitimately new 'wow that's obvious' style thing and I consider prototyping it. :)

What have you prototyped recently? Anything you have released to market? I'm in the same general area by am teetering on actually launching products wouldn't mind connecting with a like minded e gineer