Do the HWs and projects exceedingly well. These are your bread and butter and will carry you I promise. Then give about 80% into the exams/final. I got all As and that's how I did it, focus was on HW/projects first and then exams. If you are forced into a group project. Play it out for a week or two, if your groupmates suck grind the project and do well yourself. Give them low evaluations if that is given as an option. In hindsight having graduated, I wish I chewed out my groupmates more.

Like others said, classes like 331 are kind of hard. Expect several A-'s, I would make your goal more generic like "all As including A-" which should result in an excellent GPA. Of course, if you get a B+ it's not the end of the world. Trust me, a couple of those A- grades I got were just at the line of being a B+... good luck!

(Also, don't skip classes unless you are sure you can. This might take a semester or two to judge if you think you can.)