Me too.
To the OP, Ive got some methods that worked awesome for me, that may help you out. I lifted and conditioned for about 5 years. I also learned most of my methods from books, written by trained pros. The key to my work outs was variety, in both muscle group and weight/repitition. I rarely did any kind of conditioning (aside from a warm up jog) on the same day I did any weight training. One thing that really made a difference in my workouts was focusing on one muscle group during each work out. This way, the muscles you just worked have time to regenerate, and grow while your doing other muscle groups. Not to mention, it makes your work outs much more comfortable. Also, I switched off every week between heavy weights and high reps. One week, every muscle gets hit with heavy weights. Next week, drop the weight down and jack the reps way up. Also, I spent at least 1 day a week doin nothin but conditioning. Begining of the week, end of the week, or even in the middle. It never seemed to affect the rest of my routine. Towards the end I was even puttin tons of variety into the different lifts I was doin. I tried to avoid hittin the same group, with the same lift, on the same week (weight/rep), in the same month. If that makes sence.
Again, this all what worked best for me, maybe some of it would work out well for you. My results speak for themselves. I picked up 45 pounds on my power clean lift in 2 months and I could do the 300 yard sprint for our school fittness test in 55 seconds, then do it again 5 minutes later in 1:06.