This probably sounds really cliche, but understanding the concepts before memorizing the intricacies is always the way to go. This is a really basic example, but lets take DNA Replication for example:
Enzyme splits helix
Enzyme makes sure helix does not get screwed up and misformed
Primer attached to sequence
Enzyme builds DNA
Then you can slowly fill in the blanks, like the enzyme that prevents the DNA from becoming "screwed up" (too tightly coiled) is topoisomerase. I think things become a lot easier once you get the general idea then become a lot more specific.
There is always the option of making a shitload of flashcards like I used to do for my Anatomy class last year, but I found that doing that didn't help all that much.
On a side note, holy crap it's been a while since I've posted here. Hi Smogon.