Don't trap the rope ends under a strand
If you have a rappel that starts on a lower angle slab instead of more free hanging, it's good to be mindful of where the rope tails are laying.
On the left, the rope tails are underneath a strand. The extra weight on the tails from blue can make it harder to pull green.
A better way to do it is on the right. Simply have the rope tails laying away from the two ropes and you should be fine.
This can become more of a factor if:
you’re on high friction rock like sandstone
if your rope is wet, which is common in canyoneering.