Unless you are very tall, it is likely that you will need a boost every now and then in order to reach the higher shelves in your kitchen or the light fixtures hung from the ceilings. For those times, a small step stool is ideal, especially if it can be folded up and put away until needed again. Of course you want to get something sturdy – something that won’t move or slide once you step on it.
This one looks like it would be nice and sturdy, I think:
Folding step stool for adults pictured: Polder 90401-91H 2-Step Mini-Stool