For the next six weeks: 1) use your own containers to buy bulk goods (grains, flours, legumes, coffee, etc). 2) Buy non-perishable goods in larger containers that are not subdivided (e.g., buy the big bag of chips, rather than a big bag full of separately packaged little bags of chips). 3) Buy concentrates (of juices, cleaners, etc.) and dilute them yourself into reusable containers.
Many soaps (hand, body, dish, shampoo, and laundry) are available in bar form or powder packed in a biodegradable paper or cardboard wrapper. These items not only reduce the amount of waste you produce but often last longer, cost less, and work just as well.