There are many ways to earn bitcoins as doing fauceting, gambling, trading, exchanging, mining and staking. You can find more way ways and related information about earning bitcoins for with Pocket Bitcoin Guide. Also it offers free Bitcoin to earn from some of selected faucets must try Get Free Bitcoins Everyday. 
Faucet is not a great way to make bitcoin but if you have a lot of spare time to get some bitcoin then it's fine. Gambling is a good way but don't always rely on it, the greatest way to make bitcoin is by trading. Many of us are relying to this type of source of earning because it's very easy to do buy and sell of alt coins.