What to use to create a "nightstand" ledge next to bed?

Try this shelf kit or a similar one. Used a small 3/4 screw and holds small items well. Water bottle, heated pad control, flashlight, etc.
I got mine at Menards, but most places, Lowes, Home Depot, Walmart, sell them. Looks decent and works well.

4-Piece Honey Pine Decorative Ledge Set
Model Number: 0139-HNY4 | Menards® SKU: 2114992
Variation: Honey