I've managed to down down my habits since the beginning. I leave enough lights around the house that I don't need to keep one on me at all times. I've even managed to cut back on my EDC. If i'm going to be running around in broad daylight for an hour, I leave the lights at home. Going to the movies or a larger enclosed area, I'll get out my Photon on its bead chain, you never know when something will fall under a seat. If the weather is looking pretty bad outside, I keep an E2E with me just in case of an emergency. If I'm going out at night, I have at least the Photon and Surefire, and if I know I'll be working in the dark I'll bring a suitable LED light like an Inova or Mag-LED depending on the situation.
Likewise, I use this system with everything from multi-tools to electronics. One day I have a Leatherman Squirt on my keychain and a Photon, the next I'll be packing a full-size Wave with all the add-ons and a 3D LED Mag that's been to hell and back, I just adapt accordingly.