[Trunks]

One thing to keep in mind, if you want to get bigger, increase weight, decrease reps. So for example, instead of having 10 benchpresses, try for 6-8, but increase your weight to compensate. That is for building muscular strength. Muscular endurance however(leaner), is the opposite. Decrease weight, increase reps.

EDIT: Same thing can be done for most of your excercises, for example, incline situps + pushups instead of reg ones. And if at all possible, id try to work in some chinups/pullups into your upper body routine.