Working those abs, I see Little trick with the abs - go for intensity. These are fast twitch muscle fibers, meaning they respond best to low reps with a lot of weight/intenisty. Doing 150 sit ups isn't how they get ripped, doing 3 sets of 15 and being unable to eek out a 16th is.

You can also get the intensity by making those exercises a circuit - do 12 reps of one and head into the second, third, 4th, etc with no rest. Take 1 minute between a full circuit and do it for 10 minutes. PAIN. Also, try to do the lower ab execises first so that when they tire the upper abs have to work even harder.

Do you have a bench ? If yes, do the chest exercises in this order:

Incline DB Press
Flat DB Press
Incline flye

3 sets, 12 reps. The last exercise, the flye, is to stretch everything out - focus on a slow controlled rep and dont let your arms go past the bench when they come down.

It can often be helpful to work the back when you do the chest or the triceps/biceps (one or the other) - classic push/pull workouts or complimentary muscle groups (chest/back).