Simplify: Simplify your life as much as possible. Only keep belongings that you use/enjoy on a regular basis. By making the effort to reduce what you own, you will naturally purchase less/create less waste in the future.
Reduce Purchases: In general, think before you buy any product - do you really need it? How did the production of this product impact the environment and what further impacts will there be with the disposal of the product (and associated packaging materials)?
Replace Disposables: Wherever possible, replace disposable products with reusable ones (i.e., razor, food storage, batteries, ink cartridges (buy refill ink), coffee filters, furnace or air conditioner filters, etc.).
Borrow From Friends: If you only need something temporarily, ask if a friend or neighbor would loan it to you.
Share With Friends: Share things like books, magazines, movies, games, and newspapers between friends and neighbors.
Shopping Bags: While shopping, if you only buy a few products skip the shopping bag. For larger purchases, bring your own.