Try this. Imagine the loop you will be flying and put a dot in the middle.

Watch your wing tips, the belly of the plane, and the canopy carefully throughout the loop.

At each point of the roll, move your sticks towards the dot.

For example, if your left wing is towards the dot, then go left rudder. If your belly is inboard, push down elevator, If your right wing is towards the dot, go right rudder. If your canopy is towards the dot, pull up elevator towards the dot. Do 1 roll loops first with low rates to get used to focusing on those parts.

The directions sound rudimentary, but the fact that you're focusing really closely on these parts in relation to the center of the loop really helps you choose which stick to push, pull... Also, when you're at the bottom half of the loop and in trouble, it really helps to know direction of rudder or elevator you need to jam to complete the loop w/out having to bail out early.

These are steps I don't need to do while doing rolling circles. Gravity really makes you work the sticks.

Check out Gernot at the beginning of this vid http://www.youtube.com/watch?v=4sCbAxdFPQ4

At about 43 sec into the vid, you can see he's really jammin the sticks

This guys got nerves of steel