You're doing well in your classes so you clearly have some understanding of the material and a nice foundation from which to build. At the mid-year point, I would focus on:
1) Integration -- this is key and where Goljian and Pathoma are great. Integrating across subjects is huge for Step 1 and something you probably haven't done as much of in your classes since professors usually write their own questions which generally cover their own lectures. Pathoma is stronger for path (use videos > book), but Goljian does more integrations across disciplines. Goljian also helps you learn how to think. I just took Step 2 CK today and I swear I'm still getting some questions right because I hear his voice in my head helping me think through it.
2) Weaknesses - if you have any areas of weakness, this is a great time to fix them. Maybe you zoned out during some part of M1 and crammed some organ system or subject that now you've forgotten. Use whatever resource you like to brush up these areas of weakness.
3) Practice questions. This ties in with #1 too. UWorld is far and away the best bank, but they all have their strengths. Part of the skill set you need to acquire is learning how to take these national board exams. There is definitely an art to it -- training your eyes and your brain to get through questions efficiently and accurately. Most people find themselves pretty pressed for time on Step 1 (I sure did!), so make sure you go in there able to work quickly. I definitely have a process for board questions, and it's evolved as the questions change (ie. step 2 questions require you to pay closer attention to different parts of the vignette than step 1). There's no right way, just find a way that works for you and practice it til you're a machine.
4) Stay caught up with classes -- remember that spring M2 is probably 25-33% of the material on the test, so make sure you're still learning new stuff while you review!
5) don't waste time memorizing crap you can memorize later. Stupid minutiae is what you memorize right before the exam. Like Niemann pick vs tay sach's - they look almost the same clinically but one has hepatomegaly -- stick this fact in your brain during dedicated time because it probably won't last from January to June.
6) Learn to think mechanistically -- Steps are all about mechanisms. They won't ask what enzyme is upregulated in sarcoid that causes hypercalcemia; they'll show you the CXR and ask you not only about whether Ca2+ is high/low, but also how it would affect levels of 25-OH Vit D (not 1,25!). They want you to think through the whole pathway and reason it out. You can prep for this by forcing yourself to learn and understand the mechanisms behind what you're learning. Keep asking "how?" and "why?" as you learn things.
Wish I could pull that off while still functioning in med school.
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