TWL, I would suggest you look into in lifting heavy weights, very heavy weights, with very low volume. And getting lots of rest.
I've been having good results with Fred Hahn's Slow Burn methods (go to
www.seriousstrength.com for more info). He wrote a book on it with the Drs. Eades of Protein Power fame. I do two workouts a week, 6 - 8 exercises, only 1 set per exercise, 4 - 6 reps very slowly to absolute muscle failure - ie, I cannot move the weight any more no matter how hard I try. The goal is to have the weight heavy enough that you can manage to lift for 40 - 90 seconds before failure sets in.
I've been doing this for about four or five months, and I am still making big gains. I keep close records, and I almost always add 2.5 pounds per exercise each session. And of course I can see a big difference in the size and definition in my arms, legs, etc.
The best thing is that each workout takes about 25 minutes. That's it, that's all you need, 25 minutes, 2x week. Or even 1x per week, if you prefer.
Of course, my results could just be the honeymoon effect someone described above... I'll re-evaluate in a year or so...