I think it's worth experimenting with mining other coins and exchanging them for bitcoin. I've mined coins that are good for CPU's, as they use less electricity and that costs a lot in the UK. I've mined a few fairly new coins and the rewards can be good for those, but there's also a risk they they wont go on an exchange. Some coins work better with some GPU's than others. I did try mining Bitcoin direct but only made a few cents a day with my GPU and it wasn't worth it.