Tips for a long course meet and drills I could do myself

So I’ve got a gala coming up in early jan and it’s a pong course meet (50m pool) I’m doing 200 free 100 back 100 free 50 breast 50 fly and 50 free. Does anyone have any tips for swimming in a long course meet because I’ve never done it. Also the gala is during my clubs Christmas break so I’ll need to go swimming myself at some point so does anyone have any drills they recommend for this event