Amazon has "Subscribe and Save."
It's a program to order items on a 1 month, 2 month, 3 month or 6 month schedule and it applies to daily living sorts of things: bathroom items, baby stuff, snacks and food.
Need your regular fix of Chocolate Vanilla Creme Poptarts but don't want a year supply slowly going stale in your consumables order? Get 12 boxes delivered every 3 months, without thinking about it.
The options are currently limited (one brand of tortilla chips, a handful of cookie options, plenty of Seventh Generation cleaning supplies though), we're debating starting up a regular small order and adding things as the program grows.
The prices are great. And the best part? Free shipping.