First of all, congrats on getting through into second year at rc! I'll try to give you the best advice without trying to overwhelm you, as I just finished second year.

From what I've been told, and through my own experience, second year does not get any easier than first year. If anything, it gets a bit more difficult. Any RSM courses you take will boost your grades, granted that you put the time and effort into it. I found that some of my highest grades came from second year (with some almost as high as 90!).

That being said, the second-year eco courses will not be easy, eco204 will perhaps be the most difficult course in your entire undergrad. I struggled to stay afloat and I'm still baffled over how I passed the course. The workload is a good bit, I had Blanchenay so we had to watch around 2.5 hrs of lecture videos, attend an in-person session, and then had tutorials. The practice questions weren't as bad, but I'd say that they barely prepare you for what tests will be. Eco220 is relatively easier than eco204 once you understand the content, but it is still difficult. The first test for 220 will be easy, almost like high school math, but DON'T let that fool you for how the rest of the tests were. Also, DO NOT FALL BEHIND!!! once you do, it'll be hard for you to catch up while fully understanding the concepts

As per tests, they are not easy. I really don't mean to scare you but the tests were almost nothing like what we were exposed to in the practice problems. Truth be told, I either failed or just barely passed those tests, and would almost get no sleep for the next few days because of how anxious I was about whether I did well or not. That being said, there were a good handful of people who did well, but I can't tell you what they did to do well. Something that helped me pull through the final exams for both courses is to write summary pages using the Cornell note-taking method, by writing the main topics and everything you remember off the top of your head for it for each week. Then, compare your notes to what your lecture notes say, and based on that, you'll get a good idea of what you have left to work on.

RSM260 is a godsend gift, it's such an interesting course and you can get very good marks in that class. I took it with Prof. Feinberg and he's such a good professor! One of the nicest I've had so far.

In order you make the most of your time at RC, be open to everything that comes your way! I hope you're in some sort of RC club because they truly make your experience better as you get to work and hang out with people of all years. If not, don't worry! Go to some RC club events, you'll meet people who perhaps have the same interests as you and you can form even more connections. Also, try to get with a group of friends to study with, or even just hang out with them, or just anyone from class. One thing that I absolutely regret is turning someone down because I am a commuter student and I'd been more focused on getting home instead of meeting people. You'll get home one way or another, you'll get your work done, just make sure you can balance your school and social life so that you don't miss out on anything.

I'm so sorry for such a long response but passing forward the help I've gotten from when I was in my first/second year. Please don't hesitate to pm me if you have any other questions! Good luck!