Need advice,

I just finished step 1 and I don't know How I did but I need to be efficient with my time I wanted to know is there something high yield for both step 1 and 2 ck that I could do while I wait for my step 1 exam score. Just in case I did not pass I won't be rusty. Also if I decide to take step 1 again if i have to after ck and cs is there something I should do everyday to stay sharp with step 1.
thanks