Well, I usually use them for a year bulk ageing, then I bottle. A quick rundown on my still evolving process.
All I do is normal cleaning and sanitation, then I pressurize the keg, let it rest, then bleed of the o2 rising to the top. I do this until I feel cold co2 escaping from the top when I release the pressure.
Then I rack as normal.
I seal the keg with around 25 lbs of pressure, check for any bubbles as the top is still wet from the sanitizer.
Then I bleed off some of the pressure and get it to just around 10 lbs.
Throw it into my closet and forget about for around a month.
Check it for pressure, bleed it out and re-pressurize to 10 lbs.
Two days before I bottle I de-gas, throw in some Camden tablets, reseal, then de-gas in the morning and evening for the next two days.
Bottle and hopefully don't mess things up.