Tables, tables...and more tables. Maybe some flash cards too just to mix it up.
I'd suggest using Word, or maybe Excel, and create tables outlining drug classifications (antibiotics, analgesics, antihypertensives, etc). Then for each classification list the most important "nuggets" of info you'll need to know for each on subjects like Side Effects, Major Nursing Implications, Pt teaching, or any other important info to know (like other antibiotics you can use for a Pt with an allergy to penicillin -- a "Misc" category.) However, in each category list only the unique things to remember.
Per my Pharm professor, the goal would be to weed out only the absolutely necessary info, employ some critical thinking to do this...she tells me I should be able to fit an entire drug classification onto a single 8.5x11 sheet. If you have a color printer, awesome! Use colors to create easy to recognize commonalities between the drugs of one classification. I'd suggest getting ahold of a drug guide. I use Davis's Drug Guide and i definitely list the s/e in red caps, or any thing else that would seem important (like teaching a Pt on rifampin that discolored red-orange urine is a normal s/e; otherwise that'd scare the hell outta them.)
I'm taking a intro nursing pharm class this semester...it's one of the hardest classes I've taken. I'm definitely gonna review the material again over the summer and refine/redo my tables for all the drug classifications we've covered. sigh...