i took the spring semester off (+one research credit), to study for the DAT and for other reasons. what i found is that having much more free time actually made me study less (and play Halo more 😉 ). i took the test in early march and did ok. 19 AA, 22 RC, 21 PAT, 18 TS. with a 3.67 gpa. so far i've been accepted to Pitt and UKentucky. (now if i could just get into UNLV i'd be Stoked).
if i could do it over, i'd NOT take the semester off, but drop to 1/2 time, plus i'd use more study-aids. i used the kaplan book~just read through it once and did a couple practice tests, plus review of the important stuff in the margins, also Topscore and Destroyer. topscore helped me w/the test environment & PAT, and destroyer really helped with Bio.
also, TAKE FREQUENT BREAKS. you'll start to loathe the DAT and that is not a healthy learning atmosphere. get into a mode of pacing yourself as well. the biggest mistake i made on the DAT is that i spent too much time on the first few QR questions on the DAT and i ended up having to rush and guessing on the last 15-20 questions. i got a measley 16 QR when i could have easily gotten 19-20 & slightly boosted my AA.