with my first reco, i had a really slow difficult rehab, but insisted on riding at 9 months even though i wasn't really ready. i cased the wake on a ts jump - it wasn't even particularly bad, but i ended up back on crutches for a week, and stretched out my graft. after that i cracked it and did nothing at all for a couple of months (including rehab), and then when i eventually started riding again things went a lot better. sometimes i think all you need is time... be careful out there, and listen to your knee. make sure you stop before you get tired! I've heard that the knee isn't really right til about 1.5 years out of surgery, so you need to treat it right while it keeps healing. good luck.
and yeah, I'm a strong supporter of wearing a brace - with extension stops!! when i stretched my graft i was wearing a cti - without extension stops, and i really think they make a big difference.