Lots of great suggestions but none really focussed on your concern about keeping track of magic in combat. If this is a question of keeping track of buffs, concentration, magical effects, or conditions, I found using “condition rings” on the players’, creatures’, and NPCs’ minis made this much easier. I started off with just the plastic rings off milk jugs or pop bottles, but fancy ones with the words written right on them make a nice gift request for a birthday etc.
Hoxton