[sideproject]

This is exactly what I do - I also add label colours to differentiate categories. I've also made "Stupid/abandoned" list, so that I don't just delete my ideas, but put them there just in case. I find it helpful to review it every now and then. Then I access them on my mobile too! It's a great tool.

[kranner]

I do much the same thing with two Evernote notebooks called "App ideas" and "App ideas feasible". Every new idea, no matter how silly, goes first into "App ideas" and later into "App ideas feasible". It's also interesting when something moves from the feasible list to the former.