If you're worried about some of the instructions but still want to overclock, just keep voltage settings to auto in the BIOS rather than changing them manually, that way it will be almost impossible to fry anything and the only problem you'll need to look out for are temperatures. If you have an after market cooler on your CPU, then even temperatures should be of small concern, all Intel i-series CPUs have been great overclockers ever since they first come out.
Mmy first gen i7 is now 6 years old, came at 2.66Ghz but has spent it's whole life clocked in the 4Ghz range - so that's a >50% overclock, it's only air cooled, the computer has hardly ever been shut down in all those years, been under heavy load in gaming for hundreds, maybe even thousands of hours and also done many hours worth of intense video rendering - it's still going just fine.
Your CPU is newer, probably more efficient and runs cooler than mine, it will be fine to crank it up.
Edit: Sorry, thought you were talking about overclocking your CPU. Same goes for your GPU really, use Afterburner like suggested above. Increase the core and memory clock a little at a time, run some benchmark programs, see if it completes the benchmark and what the temperatures were. In Afterburner's settings, go under the monitoring tab, there you can select a large range of information to be displayed while 3D applications are running.
As a personal thing I would rather my temps don't go above the low 70's celsius, but most cards are built to withstand the high 90's and even above go boiling point before safety features start kicking in.
