In life, we always feel we need more of something or we need the next new thing. Why is that? Why can't we be content with what we have? Why do our kids need bins of toys? I remember growing up with some toys but it was never an issue to have a clean room because I didn't have too much to find a spot for. I don't think it is because we buy happiness but I do believe it is because we have the philosophy that "more" means "success". Success to me has taken on new meaning.
My son is happy and healthy. My home is clean (for the most part) and serves it's function. I have a job and am able to provide. The "things" in life get in the way of seeing the true treasures and that is our family. As small or large as we are, TIME is most important. Spending money on treasures that we will not use 5 days from now just takes away from the ability to spend time. The more you spend, the more you feel you need to make to keep up with those habits.
Live simply. Live smart and take notice to what you spend your time and money on. If you are still unsure if you have "too much" then do what my friend Daniel Day suggested. Start at your front door and thank God for each item you see as you walk inside. It won't be long before you realize how much you have to be thankful for.
P.S. I did this with my son and he stopped thinking he was deprived. :)