I don't, I type them on a paper and keep solving the cube using them until I can solve it without looking at the paper.
But I also give them a sense of logic so it becomes easier. For example:
U R U' L' U R' U' L - some corner moving algorithm for beginners method. I think in my head that the U keeps alternating back and forth, and between those, you move both sides upwards, and then both sides downwards.
Many of the OLL algorithms are just sledgehammer/sexy a certain amount of time with front face turns surrounding them, or something like that.
Easiest algorithm I ever learned was this H-perm: R2 U2 R U2 R2 U2 R2 U2 R U2 R2
I didn't actually have to memorize it, I just looked at someone do it once, and now I can do it without even thinking about it. Didn't have to read it more than once.