Buy in Bulk
If you share a shower with family or roommates, look for economy sizes or multipacks of your favorite products. Buying in bulk will save you money and time on return trips. Many brands also offer bonus-style packaging with an extra trial and sometimes full-size portions of the same or new items.
When planning your shopping trip, try to be realistic about how quickly you can get through everything. Woroch cautions, "Many beauty products have expiration dates, so the less you buy, the less you'll waste if you don't use them before they expire."