I go up to 220 out of the gate, then try for post, most boards will go that far without voltage adjustments. You might have to up vcore or vdimm or both one notch depends on the board/chip.
Then Orthos, or OCCT for a half hour. Lately on the 7XX series AMD chips, AMD Overdrive. It has temps, voltages, settings and stability testing all in one, but only for the AMD 7xx chip set. It's crud for auto overclock but reports temps and volts accurately. OCCT is probably the fastest to detect instability.
Then after stability at 220 I notch up 5 at a time and retest. After about 225 and up voltages have to increase. Ram,vdimm, vcore. When it needs more volts I up all 3, then test, then go in and lower one at a time until I find the one (or two or all) that needed to be upped. At some point you might need to up the North Bridge voltage as fsb speed and ram speed are linked and if the ram speed goes up to far you need more NB volts. That's what makes AMD OCing more interesting, more variables.
You also need to lower Hypertransport from 5X to 4X if you OC very much, from 4X to 3X farther on in the OC.
Then usually the last variable, ram divider, if your really clocking up, you might have to loosen the timings on the ram, and or set a divider. Like 800 Mhz ram, you might have to set it to run at 667 in bios, then with the OC bring it back up to and past 800. You have to find a balance.
I'd rather have a milder OC with tighter timings, than a higher OC with looser timings for every day use. Benchmarking heck with the timing go for straight out CPU speed and ram speed, benches love that.