Well, overclocking isn't all that hard, but some precautiionaries must be taken.1 - Sufficient cooling. This generally means no stock HSF, and some good intake and outake.
2 - Know what your doing.
3 - Go slowly!
4 - Check your temps! Let everything idle for a few hours, check the temps. After, run StressPrime 2004. Let that run for 30 - 60mins. Check the temps.
5 - OCing depends on RAM. You wont be able to overclock well with a couple of stick of DDR333.
Those are the precautionaries. I just woke up and don't feel like explaining everything else.