Here are some oblique workouts to try. So start neutral, standing up with the bar on your shoulders for both of these exercises.
On the right, is lateral bends with the bar. Once the bar is on your back, drop your shoulder to one side, don't stick your hip out, and use your obliques to pull the bar back to neutral position. Do your other side, and that's one rep. As always, do as many as you can!
Last is oblique crunches on a physio ball. Find a wall and station yourself so that your feet are on the wall with your leg that is on the bottom staggered on front. Stretch all the way over on the ball, and bring yourself up squeezing your obliques. Do this to each side.
Enjoy your workouts today! :)