Have you not earned some tips on this from the tons of ways people share their ideas about Bitcoin? Trading and mining are the two major ways to earn Bitcoins. The two are the most popular ways to earn Bitcoin. The two are also demanding a lot from anyone who is interested to get into it.

If you want an easier way that does not demand any high level skill then you might want to join campaigns here in Bitcointalk. There are several tasks here that will pay you in Bitcoin or in altcoin which you can convert to Bitcoins later.