I come up with a nickname for each jump, that way as I practice my course in my head, I can visualize each jump.
I walk the course first, it helps me visualize where I need to go, the path to take to each jump, then I memorize each jump by its color or something diferent about them!
If I get the chance to see someone doing the course that would help me too!
Hope it helps
I like to "draw" it out in the air or remember the jumps by numbers, colors, or type. Like blue vertical, then red oxer or something like that.
One thing that really helps me is memorization and running it through in my head or watching other people...also sometimes being able to walk your course is also helpful!