I don't usually start at a higher pressure, and reduce it, because then I have some foaming issues. I have that right, as a matter of fact. I was impatient to drink this IPA, so I set the regulator to 30 psi for 26 hours, and then turned it down. It's carbed, but I'm getting foamy pours. Which sucks, because I know better!
Anyway, my steps to kegging:
1. Clean/sanitize keg and racking cane.
2. Rack the beer from the fermenter to the keg.
3. Put on the lid and give the keg a blast of co2. Purge (pull the pressure relief valve) and fill again. Do it one more time (this purges out the oxygen). Then give it a final blast and check the lid for leaks. I spray star-san around the lid to check for leaks.
4. Put the keg in the kegerator at 10-12 psi (depending on temperature).
5. Wait 7-10 days and then pour 3 ounces. It'll be sludgy and icky- discard that. Then pour a beer. You should have nice clear beer, pretty well carbed, by then.