Blockchain.info and Coinbase both make it extremely easy to make a paper wallet, but if you would prefer to not depend on them, bitaddress.org makes it easy to set up a paper wallet that you can add money to.

Once your bitcoins are in a secure paper wallet, you can hide them away somewhere (just don't forget where) and your coins will be completely safe. Even better, by using the paper wallet's public key, you can continue to accept payments and add more Bitcoins into your account.