You could mine litcoins. they're the silver to bitcoin's gold
i think gpu mining in litecoins is still relevant. but you need to invest a lot of money.
IMO AMD has better cards than NVIDIA for mining.
ASICs are being rapidly developed for Scrypt, GPU mining may not be profitable any longer. If you want to try out, you can buy some Litecoin ASICs and test it out, however, you might be not going to make ROI.