Discouraged, but not giving up.

I kinda mailed it in today. I'm still tired from yesterday, and I also made the mistake of weighing myself before working out. I haven't lost a single pound in three weeks. I think what this means is 1) building muscle and 2) I need to really, really not weigh myself again until I see some kind of change. This is about fitness, not weight, but it's also about fat loss. I don't want to become scale-obsessed.

Anyhow, today I did:
-5 minute cardio warm-up
-20 reps, 30lbs lat pulldowns, mostly to work out the soreness from yesterday
-2sets, 15 reps, 40lbs leg extensions. Starting the ugly process of working out my injured knee.
-swam moderately for 20 minutes

Still , better than nothing. I think half of this battle is establishing a routine. I can worry about pushing myself more once I've been keeping to my routine for a month or so, I think.