I absolutely cannot stand wasted food. It's one of my biggest pet peeves. I will scrape the bottom of any jar or baggy to get as much out of it as possible.

It's a bit contradictory of me though 'cuz I tend to cook larger quantities of food and sometimes wind up having to throw it out anyway 'cuz it didn't all get eaten before it went bad.

As far as grocery shopping goes, I try to only go like twice a week. I'll take stock of seasonings and any cooking liquids (vinegar, soy sauce, etc) that I'm running low on and buy new, but I'm sure to use what's left of the old first. Some days, though, I'll go and get just enough for a couple of days 'cuz I don't feel like standing in line and taking 5ever to get it all rung up and paid for.