Recently, I've been trading bitcoins on btc-e, earning only a little, yes, very little, except the fees that btc-e takes.
Besides trading, are there any good method to earn bitcoins? Thanks.
There are a lot of ways to earn bitcoin aside from trading, you can join signature campaigns, translation campaigns and social media campaigns in the marketplace. There a lot of job posted there too which paid with bitcoin or alternative cryptocurrencies, like graphic design, community manager, web developing etc.
You can earn through gambling but it is very risky.
Bounty campaigns is a great way to earn too, just speculate if the bounty has really a responsive team and a good platform.