If you do have a resume, try to keep it updated. This will make your life easier when you hear about great jobs with upcoming deadlines. A lot of the really good programs have application deadlines in early winter. If you're going to do something after you graduate, be it grad school, employment, travel, etc. Senior year you'll be so frantic with comps that you'll be glad you started early.
Internships are a great way to get experience in a particular field.
They're usually fun, too, which is why your PCAs recommend that you do a bunch of them. Feel free to contact us anytime.