1) I no longer run out and replace items just because I threw them out.
For example, I recently cleaned out and organized our Tupperware cabinet. In the past, I would have rushed out toTarget and bought replacements for what I had just thrown out. No more. I decided instead to wait, give it awhile and see if we really needed more food storage bowls. Guess what? It has been two weeks, and we have survived quite nicely.
2) If I bring in something new, I get rid of something old.
My husband and I have been married for seven and a half years. Most of our towels, cooking utensils, and bathmats, etc, were wedding gifts and they have started wearing out.
And since quitting my job two years ago to stay at home full time, I am much more careful about how I spend our money. So I was just making due...until my mom asked me, very kindly... did I actually cook in the saucepan she was using to heat our spaghetti sauce? All the scratch marks from the Teflon which had peeled off were a little disconcerting, so I decided that, yes, there probably were some things around the house that could stand to be replaced.
So over the past few months, I have slowly been buying a pan here and a towel there. (This way I have been able to replace all our worn-out stuff without a huge outlay of money, and it has worked nicely.) Anyway, I make a point to throw out one old item for every new item I bring in. This way we're not accumulating even more stuff, again.
3) Less Stuff Makes It Easier To Be Organized.
Less clutter makes it much easier to know what you have and what you don't have. Then you don't go out and buy stuff that you really don't need, since you already have it. I run into this problem all the time with spices. (Organizing my spice cabinet is on my (never-ending) to-do list.) I frequently buy a spice that I already have but don't realize it until I've gotten home from the store. With fewer spices, it would be much easier to see what I have and what I don't.
4) More expensive does not mean better quality.
I have learned this the hard way. I used to believe that the more expensive product was the better one, so that's the one would buy. I don't know if this used to be the case, but I know it no longer is. One example is the humidifier I bought for my son last year. I chose the most expensive one Wal Mart had thinking it would last the longest and be the most effective. It officially conked out after about 6 months of use. It's replacement is the cheapest one Target had on their shelves and it's been 3 months and counting, and if it does die soon, I'm only out about 18 bucks.
5) Frees Up Money And Time Which Can Be Used On Experiences, Not Stuff.
If you buy less Stuff, you obviously spend less money on said Stuff. This frees up your money to use on other things... like family vacations and college funds. It saves time because you don't have to devote weekends to clearing your home of all the clutter you brought into it.