Sand down any rough areas left from the wand until it is smooth. I like to round off some of the edges and get a slight taper to the tip if the stick doesn't naturally have one.
It doesn't have to be perfectly smooth, remember that this is a natural product, so will have some imperfections.
Personalise it with colors, letters, numbers and symbols etc, in fact anything that represent you.
You can use feathers, paints/inks, carving or charring (pyrography), or wrap a fave material around the handle. Symbols may be runes that spell out your name, an astrological symbol, craft name, etc.
Alternatively, carve a socket (or hole) into the tip and set into it a natural crystal, or carefully drill a deeper hole into the tip and place in it a feather, four leaf clover or anything that represents you, securing it with glue, and if needed full the hole back up with a filler and sand smooth when dry.