I keep a 2xAA Coleman LED on my nightstand and have a similar one inside my SHTF bag. And 1 Inova Microlight on my keyring and a similar one on the outside of my SHTF bag.
In my company van I have a 4D Maglite, a 2xAA Maglite and an Energizer LED headlight. I also have various small 3xAAA "shorty" cheapo lights laying around everywhere so they're easy to get to.
The main one I use regularly would be the Inova on my keychain, because it's the closest one being in my pocket.