I agree the OP needs to share his own tips. Damn.
I'm someone who tends to have a harder time bulking up than getting lean. Before I joined a gym 10 years ago I weighed 135 lbs. standing 6 feet. So there's that.
Not that long ago I made a conscious effort to get bigger and weighed as much as 195. I probably looked better in clothes than I ever have, but some of that was definitely fat. I enjoyed being "big" by my standards but when my workload at the office dramatically increased and it became I obvious I'd have to skip gym days more often, l decided I'd rather stop focusing on getting bigger and try to get lean without losing much of the muscle and strength I'd gained.
It's been a breeze. I'm still getting leaner since my profile pic was taken about a month ago. I don't do cardio. The main things that have helped as far as I can tell are 1) taking extra rest days, but eating light on those days and 2) making a point of having cheat-meal days every 4-5 days. I think they really do keep your metabolism up, plus it makes sticking to your diet the rest of the week easier because the chance to eat Tex-Mex (typically my cheat meal of choice) is never that far off. I think I actually had a harder time getting or staying defined when I was more update about watching every bite of food I ate.
Those are my lazy-man's tips.