I just had mine done (patellar tendon) on wednesday. Shit sucks, my doc has me in a full extension brace until friday. All I've been doing is eating perks, surfing NS, fucking around with FCP, and watching lots of top gear. I'm stoked to get this brace off and start with some light PT, but I can already tell that being in the brace for over a week is going to cause significant muscle atrophy. The first night I had excruciating spasms in my calf and hamstring, those also really sucked.
I've been trying hard to eat very healthy and stay hydrated, and have been taking joint supplements every day since about a week prior to surgery. I injured it in early April, so I didnt get enough ROM back to do any sort of real prehab until like 2 weeks prior to surgery, but I was on the stationary bike 5-6 days a week for those 2 weeks.
Here's a PDF I found that has sort of a general timeline of what can and should be done post op:
Good luck in your recovery man. If you can, find something productive and positive to focus on while you are rehabing that will keep distracted from the fact you can't do all the sports you want to be doing. I know I am going to be building some DIY camera gear, and filming lots of skating/summer skiing with friends so I can really improve my filming/editing skills before ski season.