I would say that you open a wordpress blog and write what you are actually good in.
For Example:
If you're good in football, then make a site providing information on football, latest updates around the world, some popular football player's facts, etc. But do this only if you are crazy about football.
Also, honestly, no one would give you an idea. If others have good ideas, you'd be seeing every other single guy becoming the next Mark Zuckerberg. So you have to run your own brain and think think think.
(Hint: Make a website about something which you do often - cooking, football, reading books, etc. as it'll be easier to maintain for you).