Twist-it flashlights are good, too. However, the one I have doesn’t really give an impressive amount of light.
Most flashlights come with a cheapo stock bulb.
But you can go to a Radio Shack or other electronics outlet and usually buy a Krypton bulb of the same voltage that will give you a lot more lumens.
Remember, though, the brighter the light, the quicker the batteries give out!