What is your weight training program? Do you mind sharing?
I do a 3 or 4-day split. Day 1 is chest & triceps, Day 2 is legs, Day 3 is back & biceps, Day 4 is a very light leg workout or a rest day, depending on what else I'm doing. (I still haven't figured out the nutrition part, so I really watch myself to make sure I'm not overtraining.)
I superset almost all of my exercises - that is, I combine exercises that work the same muscle group to get a more intense workout. e.g. my 1st round of chest exercises is: *(1 set 7 reps pec flys, 1 set 7 reps bench press, 1 set 7 reps decline press) repeat from * 2 more times.
The important things that I got out of working with him are these:
1. Proper form is paramount. (He's a former bodybuilder so he knows what he's doing.) You're not going to get anything out of weight training unless you're using the right muscles. This means sacrificing the desire to lift heavy weights; instead stick with lighter weights & good form until you can handle the weight.
2. It has to be a part of your life, your baseline activities if you want to call them that, like eating & sleeping. In other words: no saying "I don't need to go to the gym because I already rode my bike/did yoga/did something else active." When I made the gym my regular workout instead of my fallback activity, that's when I really started to notice a big difference.
3. You have to change it up. I get bored very easily & I think my muscles get bored too, so every few weeks I introduce new exercises or change the order of things.
I feel that as I get stronger and more confident, it gets more fun!