Is very hard to collect some amounts of bitcoin.For starters faucets is a simple way to collect some bitcoin.After this you can use signature campaigns.
It is not really hard to collect bitcoins now a days if you know what is the best to be done, just ignore some of the options and put some effort and time, stay away from faucets and gambling, faucets will waste all your time and gambling will cost you a lot, so choose what is best for you and you can collect bitcoins with time.