Make posts restating received opinions on forums. Pretty soon you'll be able to join a signature programme that pays you in Bitcoin. Carry on posting rerceived opinions so that nobody flames you, and save the Bitcoins you earn
He asked for other ways to earn Bitcoins than Signature campaigns and Gambling. I dont know why people dont even read the OP and reply, may be because they are blind for signature campaign money.
I guess the other ways are trading or investing if you have btc.