College student financial advice

I am interested in hearing how other students/ former students financial plane/ advice. Do you track your finances? How? How much do you typically spend a month? What credit cards do you use? How much do you have saved/ invested? I feel as if I am spending too much recently around 1-1.2k a month in my junior year. Last year I typically spent 400-800 a month. Have 10k saved, 9k invested. Worked since I was 14 and had about 30k saved before going to college.