If you vacuum often and dust regularly, you'll cut down on the possibility of hosting unwanted guests in your dorm room. Vacuuming will get rid of crumbs and other tasty morsels that may lure in undesirable company, plus may eliminate insect eggs, webs and other accoutrements necessary to their survival and propagation. While dusting may seem to have no connection with keeping out bugs, it definitely helps. Dusting gets rid of dirt and dust, and certain insects, like the hearty cockroach, actually eat both! If you maintain a neat and clean dorm room, it's also much easier to spot pests -- and quickly eliminate them -- if they do manage to get inside [source: Orkin].