If you tend to write really long lines of code, you may like to add a vertical line to Sublime Text 2 after 80 characters. Put the following in your settings file.
This is an array, so you can add as many as you want. I put this:
"rulers": [80, 90]
If I can finish a line of code between my two horizontal lines, I will (I call it living on the edge) but everything to the right is forbidden land where characters will be sent to character heaven.