The sticky thing about this subject is that everyone seems to have VERY different techniques, and they all work out. Though it is tempting to feel that you should be something just because others are, that doesn't mean it will actually help you out. I am not intending to step on any toes in what I'm about to write, but I just want to give my honest opinion. 🙂
My studying methods were quite different than many others. I studied ~3 months, taking off days here and there when I just couldn't muster the concentration I needed to studied. Up until the last week, I never really studied more than 4.5 hours a day. I'd wake up, start studying around 8, and never study past 3 o'clock because that was when my boyfriend got off work; I'd spend all of my evenings with him. And, during the time I was studying, I'd take multiple breaks. I'd work for a while and then go take a shower, work some more and then go eat lunch with my Mom, etc. If all I had done was study from the crack of dawn until I couldn't keep my eyes open any more, I'd have burned out within the first week! Though it works for others, it is NOT NECESSARY to put in crazy hours. If you are good at preparing for tests and know how to zero in on what's in front of you, I think 4-5 hours a day is the max you need. Don't feel inadequate if you aren't putting in 12-hour days.
Also, I don't think it's necessary to get your hands on every study material out there in order to succeed. Get your hands on a few tried-and-true materials and really MASTER them. I think some people spread themselves too thinly between all of the resources available, and this results in a greatly lessened payoff because they aren't fully learning any of it. I prepared for the DAT using primarily CHAD, Cliff's AP, Barron's AP, Math Destroyer, and Crack the PAT. It's all in my breakdown. I ended up with a 26 AA/ 30 TS. And honestly, when I began studying for this test, I didn't know much of the material beyond OC. I'd had few upper-level bio classes, I had completely forgotten GC, and I haven't had a math class since my junior year of high school. I also didn't take a SINGLE practice test--I felt that I was much better off reviewing the full concepts over and over again than I would have been if I just reviewed bits and pieces of subjects through individual questions.
This test is very doable. Go into it with the right mindset, work your tail off in an EFFICIENT manner, and you'll succeed! 😀