OP, I believe you would be able to see the sticky thread in this board. In case you missed it, it is this thread - [General] How to earn Bitcoins. Just eliminate the "investing" part since you mentioned "without investing".

If this was an old times then faucets could have been the way for you, but now they are just a waste of time. Not sure if it was still worth it these days with referrals, but I would assume that you are trying to earn one by your own and without of anyone's help.