Listen to goljan in the car on the way to and from school.
If your school is normal first year, abnormal second year, then you probably haven't looked at pathoma yet - get it. I still use the book as a reference on the wards.
Our school was organized by system, and we generally had tests on Fridays. So say we are starting GI - I would glance through BRS phys GI the weekend after the test. I didn't do this often, but it was a good refresher for systems I wasn't good at first year.
Starting in January, read through FA and ask yourself "does this statement make sense?" If it doesn't, look up the answer and write it down. Your goal isn't to remember what you read - you won't. Read it to see if you can explain what's in it and look up the answer if you can't (ie, can you explain the pathophysiology behind the clinical and pathological features?).
I did get USMLE Rx for the year and UWorld starting in January. Not really sure if I ended up using much of either before dedicated step studying time.
I also got sketchymicro about the middle of 2nd semester and started watching them in the mornings. Maybe you'll be lucky and by then, they'll have videos for all of micro. But they're great if you're a visual learner. I think you can view a few of them for free to see if you like it.
Trust your school and learn the material well the first time they teach it to you - that's probably the best piece of advice I can give you. I also struggled with the MCAT (took it 3 times) but ended up doing fairly well on step (7 weeks of studying...probably could've done it in 6, and 1 of those weeks we still technically had class). I think a lot of it was the hard work I put in throughout the year. I had a good foundation of knowledge going into step. You want to minimize the amount of relearning you have to do during step studying.
Also, since you have a short time for studying, I would think about how you want to study for pharm. I ended up using Anki for that, but maybe it would be wise to start reviewing pharm before the end of the year. Step pharm are gimme question if you know the basic MOA, indications, and SE.