[OulaX]

Coming up with an idea for a product/service has always been the reason that stopped me from starting my own business!

[DougN7]

You don’t have to come up with something original. If you see something and think you could do it better consider it.

[SoftTalker]

It also doesn't have to be very complicated. patio11 on here famously got his start selling a program that made bingo cards for teachers. And then doing automated appointment reminders for doctors. Neither of these ideas was complicated or original -- you just need to solve a problem that enough people have, and (critically) be able to market it.