I always say listen to the body...what feels natural is what you do. However, be aware that the road frequently dips down on the right as opposed to the left (assuming you're riding on the right side of the road!), so beware of that balance. If the dip is deeper than you thought you could just tip over. Most importantly, I find having clips that adjust is imperative. Mine are set light, meaning they won't release my foot on a steep climb, but if I need to unclip quickly I won't have to struggle.
Good luck!
M