This is exactly what I do. Figure out what annoys you, personally. Then think about how to make it not annoying. Then build it. If you want to make money, go a

This is exactly what I do. Figure out what annoys you, personally. Then think about how to make it not annoying. Then build it. If you want to make money, go ask your parents what they really dislike about using computers. Then, follow the same process as above.