Profiling your screen is possibly the easiest thing to do. Its also absolutely essential, unless your know the colours you screen is displaying how can you know what you are doing during the editing process.
X-Rite are possibly the best know company in modern profiling technology.
The first step to profiling your screen is to get hold of a measuring tool, for as little as a £100 you can now get a simple screen calibrating tool
Its a simple USB device that measures the output from you screen, the software flashes up known colour values and the calibrator measures the output value, it then generates a screen profile for your computer. This profile then ensures your screen displays colours accurately.