I have a cough where a little bit of phlegm comes out. How can I get rid of my cough before my basketball game tomorrow?

Depends. It depends how long you have had that cough. If it related to a recent cold, then any over the counter cough medicine should help a bit. If you have had this cough for a while and it worsens with exercise, you may have asthma. Talk to your doctor about your cough.