Despite the rigors of grad school, it is good experience and pretty much require d if you ever want to run your own project, work in many places, and earn more money. Spend some time in the lab identifying and cataloging artifacts. Map reading skills are important. Specialize in something like fauna, lithics, ceramics, plant remains, or anything you find interesting. Plan on going to grad school eventually for an advanced degree.
Most archaeology is cultural resource management.
This work is done by small firms that are businesses, so business courses are useful. A lot of time is spent preparing bids and proposals for projects. I wish I had taken some soils classes. Geomorphology is another important area. Skills that employers are looking for include computer experience, mapping and drafting programs like Arcview and Autocad.