I'm starting s podcast to help with this problem. The idea is I pick 1 small business / industry a week, and do 5 interviews with different business owners from that industry, asking about their business, the problems they face, etc.
start with me-too products. just go through the app store. make another todo list.
a lot of it is practice and experience; even if you don't have any ideas you like, you can get the practice and experience in while you're looking for the idea you believe in.
besides, sometimes those me-too products tend to have lives of their own.
Do you think you'd listen to something like this?