Please read this HuffPo article if the title makes no sense to you.
This one is short because happiness shouldn't be rocket science, in spite of all our best efforts to make it so.
One idea I find in most things I've read about happiness is that comparing yourself to the Joneses is the worst thing you can do. So stop it.
As for being ambitious and feeling special, that's tough because it's easy to use the latter as fuel for the former, when really it should be the other way around. More intellectually than emotionally doable, though it's a really good idea to strive to get there on both fronts.
Work hard, respect your time, give it to the people you love (including yourself).