The Gun Counter

Depending on how paranoid you want to be:

Get pair of jeans, a denim jacket and a hat that will be for outdoor wear. Drench them in DEET. Wear them outdoors and don't wash them. Reapply the DEET occasionally. Keep junctures tight.

Also, get chickens. They'll eat the ticks.

Deal with em as they come. There is no real prevention that is 100%. Long sleeves, boots, and bloused pants, with spray on em, but you'll still get a few here and there. The one you found in the bed probably came from unrelated laundry.