I tend to request constructive feedback on many different things knowing there will be times I'll arc up at what I hear or read. I've requested website reviews for months now and finally a website critiqued mine. The first lines were about the great content, author is a great writer (blush?) AND then line after line of feedback...

Have you ever considered joining a think tank? Have you ever considered discussing issues very important to you? Are there things in the world you see wrong, that you might like to fix?

Weird inventions can be useful too, but even if these ideas are never actually used, it's just good for the imagination to think outside the box.