I don't necessarily mean negotiations at work, but rather in your day-to-day life. I find these skills useful in relationships (compromising skills), getting donations for a local charity (compasionate negotiation skills), reducing your cable bill (hard negotiating skills), etc.
For me, these skills definitely get honed over time. I've been on a mission to reduce all of my regular bills over the last while. Almost every one of our bills are negotiable, without reducing services. To date, I've successfully negotiated lower pricing for my cable, home phone, cell phone, and banking fees (went from $15 per month to free). I rarely accept the sticker price on large purchase (furniture, cars, etc). I'm sure my skills suck compared to countries where bartering, and negotiations are common-place, but I do enjoy getting a deal
Simply to get along with your neighbours, or the people around you in general, you need to have some basic people skills (which I equate to negotiating skills).
What are some examples of your best negotiations ... outside of work???