One area I do need some work in is my core, I can see my abdominals developing but I still need to work on stabilization.... I've been doing sit-ups, weighted crunches, back extensions, knee raises, side dips? (I can't remember what they're called? Laying sideways on the back extension machine, and dipping up/down to work the obliques), as well as other exercises, but still feel like I need some better stabilization. Any tips are greatly appreciated!