First thing is first. you have to have classes to move on to your 2nd year right. My suggestion (based on my experience) work on one class at a time. That way your not overwhelmed with home work and cramming for last minute studies. also it doesn't hurt to attempt to play to your strengths. for example if your a great herbologiest then herbology is the way to go. Or perhaps you are more into making solutions and potions. then you want to take potions. but try not to over whelm yourself with too much. leave some time for yourself too.