I've launched five of the ideas off my list in the last three years. http://NearbyGamers.com is the only public success (though it's small and growing rather than big and robust). I've got one idea currently in development and am actively exploring the design and market for two others.

I reorder the list probably every six months or so as markets change, I have new resources, and I finish things. With >30 ideas on the list I know I'll never get to them all.

To be honest I do. I also pick which ones to add based on how much free time I expect to have coming up and what I'm looking for and drop some off the list totally if after a few months I start to question it's feasibility.

For example in a few months I am relocating to Australia where I will be traveling with my girlfriend for a year before picking a city to settle in for a while. With that in mind my current choices tend to settle around smaller "set and forget" sites that provide steady if small recurring incomes and things that look good on a consulting portfolio as I will probably take a few contracts as well during my travels and like to have current projects to show off.