The Elder Scrolls V: Skyrim Tips

Misc Torches Help
Companions can be given multiple torches to use in dungeons to help illuminate the area.

These torches are commonplace, being able to be grabbed off the walls of caves, dungeons etc. It also helps improve your sneak skill; causing the area to become darker and harder to be detected. The darker the area, the more invisible you are; so remove all the torches you can find!

You might see areas where there is a translucent liquid stain on the ground. That is Oil, and you should see it's beneath a lamp that's hanging barely. By knocking that lamp down, you can set the area beneath on fire and cause major damage to enemies stupid enough to walk through the flames.