OK. first...do not stretch your IT band if you have an LCL tear/sprain. second...yes, get all the swelling out of the knee that you can. Get full range of motion (get your knee so that it bends as far back and straightens as straight as your opposite knee). Work hard on your quads and proprioception (isometric quadricep setting and straight leg raises are most important, single leg standing, etc). Don't REALLY worry about your hamstrings as of yet because it will be all for nothing if you have surgery upcoming for now.

So...basically...decrease the joint effusion, increase ROM/quad strength/proprioceptive abilities of the LE...and have fun in surgery.