If you want to give yourself a bit more of an authentic mining feel then why not head into the caves with a mining helmet! Instead of placing a ton of torches all over the place, you can don this helmet that has a light on it to illuminate dark areas in which you are exploring.
If you like striking a nice look and feel to your world, then you will want to have some beautiful looking bridges! Miner's Helmet They can be all of the different wood types, as well as utilizing a fair amount of the different stone that is available in the game. While you would normally be stuck kind of creating your own bridge, this mod will give you some beautiful looking blocks to create ones with.
While this is a fairly simple mod, it adds a pretty nifty feature to the game.