i used to take every single step of a skill sheet and put it on a piece of scrap paper..i would then mix up all the pieces of paper and then put them in the correct order.
if you are already affiliated with a department, have someone help you with them. grab a training dummy or another person and run through some scenarios.
if that isn't available, get a couple friends or family members to help you.
as previously stated, repetition is the key!