How do you remember the function of the Na+,K+-ATPase pump?
Remember it this way:
3 Na+, out. ('out' has 3 letters)
2 K+, in. ('in' has 2 letters)
If that isn't feasible for you.. Remember when a cell experiences anoxia, cellular swelling can occur as a result of necrosis? Cellular swelling here occurs due to the accumulation of Na+ (& subsequently, water as well) in the cell.
This is simply explained as follows: anoxia leads to the lack of intracellular ATP, therefore failure of the Na+,K+-ATPase pump, therefore Na+ accumulates. (this shows that in normal states, Na+ is supposed to be pumped? OUT!)