Hi there and I too battle on stairs but always follow two rules
No 1 is to have one hand for yourself (to carry or hold something) and one hand for the bannister rail - always
No 2 is to count the stairs as you go up or down so you know how many there are to be dealt with on the return journey.
I have a split staircase at home each flight with 10 steps so easy to remember but my daughter has a 16 step spiral staircase which is like going up a lighthouse and I need one hand for the rail and the other for the wall. A third hand would be a welcome aid.
Good luck