I have always liked a good flashlight. As a kid, I even asked for a 5-cell D Maglite for Christmas (which Santa brought!). This past December, I picked up the ThruNite Archer 2A flashlight from Amazon, based on a review from The Wirecutter. At $30 it's not cheap, but boy is this thing great.
It uses two AA batteries and puts out an incredible amount of light. There are four brightness settings, ranging from dim (great for when your eyes are adjusted to the dark) to blindingly bright. I also like the fact that it's compact; you could easily store this in a bag, car console, or junk drawer without taking up much space.
Since I bought it, I've put it to use in a number of ways (looking for dropped items in the car, using it on walks at night, and hunting under furniture for lost cat toys). I highly recommend this spectacular flashlight.