A side step means you are leaving all the fancy magic behind on the other approach. Bare minimum is AP off, FD off and fly yourself to the new runway. A few things you can do if you are expecting it?
Load the other runway in the secondary without an approach. If you brief the other pilot they can pop it in and this will make sure the GPWS does not get excited. Also if your airline does not state what pages you must have in your MCDU you could have the secondary runway in the prog page for distance so you can calculate your 3:1 descent if you don't have VASI/PAPI or the like.
At the end of the day it is a visual manoeuvre and you shouldn't need anything. Sometimes a side step is pretty simple (LAX 25L to R, SFO 28R to L) other times it is not as easy (MEX 23L to R or to a lesser degree 05R to L) or you may have more space to cover (YVR 26L/R) Other times it gets more fun when it's not a side step but changing runways completely (though this usually happens above 1000 feet, though you may not have time to plug in the next approach).
What do you actually need for a side step? The Mk1 eye ball and the ability to fly the plane.