This may not be helpful, but I think about it really hard for a long time :-) No joke, I've spent weeks thinking about a single problem whenever I had downtime.

This may not be helpful, but I think about it really hard for a long time :-) No joke, I've spent weeks thinking about a single problem whenever I had downtime. It works for me, but I don't think a lot of people want to think about something that much.