Ask HN: How do you get startup ideas?

When I was in my early 20's I used to have lots of interesting ideas. I was lazy and as no one else was doing them I did nothing, as I figured there was no demand. 8 of them are now being done by large companies and appear successful.

Now I'm in my early 30's I'm less creative and have fewer ideas, and when I do 1+ companies are already doing it (usually 10+) and blogging about their success, or the market appears too small to be viable.

Where do you get your inspiration, and have you any suggestions?