Forget about the average computer user. What would be useful in YOUR everyday life. Write that, instead.

If you try to write something that would be useful to the average computer user, then there are a thousand different versions of it already....or I could have just said: Create FaceBook. The point is that there are thousands of people trying to write something useful because they want to make money. If we had such an idea, would we just cast it away? Well....I might, but I've always been more into anti-social media, so my ideas might be funny, but wouldn't likely to be either useful or profitable.