The first definition of deal with is to take action on something. Here are some expamples of this meaning:
1. I can't talk right now; I'm dealing with a small emergency.
2. In this job, you have to deal with a lot of paperwork.
3. I don't have time right now to solve this, could you deal with it?
You can read this verb in use in a nice post on zenhabits about dealing with things only one time in order to be more productive. Do you use this method?