Just finished the first week, and the best advice I have received is use a method you feel comfortable with, and stick with it. That a lot of first years waste time switching between methods trying to find the 'best' method, especially in anatomy. Also, be willing to try someone else's method, but if it doesn't work for you from the beginning, don't try to force it. In a class of 80, I am observing at least a dozen distinct methods of learning anatomy.
If you have never taken a learning style quiz, now may be the time. If you are visual, use visual methods (picture flash cards, drawing, diagrams, cartoons, photographs, etc), if you are audial read/repeat out loud, write, diagram with words, describe, if you are tactile, spend time in the labs, model things in clay/putty, etc.
As for reading before/after class that probably depends on you, the class, and your situation. I normally prefer to read before class, but because orientation overlapped starting classes, I didn't have a chance to get organized, so it just didn't happen. Don't plan on reading everything. Our instructors 'assign' or 'suggest' 3-6 chapters a night.
Also, if you have an organization system that you are comfortable with, this may not be the time to change it.
For me, one of the BEST things I am doing is laminating the diagrams/illustrations the instructor has for lab so that they don't get nasty during cadaver dissections. Also, can write on them with dry or wet erase markers. And I brought a waterproof journal and pen to wet labs/dissections to note things down. I also use onenote on my laptop and I take 95% of my notes on my tablet pc. Others are completly paper oriented.
Review daily, don't get behind. Find out from upperclassmen at your school what matters and what doesn't. If you have something you are deficient in (such as microbiology) address the deficiency early....get help BEFORE you are desperate for it.
Not that any of that means much, it is week 1 for us.