You should cleanse, charge, and bless it. There are many methods to do this but the easiest would be, rubbing some salt water on it [cleanse] then hold the want and visualize/feel energy pooling in the wand [charging] and finally saying a little something and asking your deities to bless it [blessing obviously] then leave it on your altar overnight or in the window under the moonlight.
From there you can use your wand, just try and make sure nobody else touches it. Not everyone follows this belief but many feel if you let other people touch your magickal tools their energy will run off on it and you will have to cleanse and charge it again. Personal preference, but I thought I should add that point.