Step 1. Line yourself up as straight as possible, this will eliminate your front or back wheel washing away when you are going up the other side of the bank. Make sure you are in a gear which can pull you through the mud and enable you to get the front wheel into the air. (Because this was a short run up, I was in 2nd). Size up the bank and essentially spot the target point where you would like your front wheel to land, in most cases the further up the other bank the better.  Here you can see I am gripping the bike with my knees and legs and have started accelerating to get the front wheel off the ground to carry it across the mud.