i know everyone has posted what they do but this is
what i do
The night or day before the race i discharge my packs at 30amp and when
the packs have dumped i equalise them (i use a trinity absolute zero tray)
and then i put them away until i have to charge them at the track.
When i have finished the race i leave them with the remainder charge left
in them until next week. If you discharge your packs after the race and leave
them for a week there is a chance that one or two of the cells could go bad.
Every 1 or 2 race meets i run them through a spintec. This is really good for the cells and internal resistence will be lowered and voltage and runtime will be increased.
And thats all to it!
Just set aside some time the day before your racing and your cells will stay good for a long time.