There really is a different mentality when it comes to startups. When I think about any of my ideas I shoot them down because I can't see any value in them lon

There really is a different mentality when it comes to startups. When I think about any of my ideas I shoot them down because I can't see any value in them longer than 5 years or diminishing returns. Can anyone recommend some good reading on where the value comes from or how it can be created?