Keeping the house free of clutter

I've moved into my house for 1 year and 3 months and observed the things in my house slowly increasing. Books, CDs, stationery or bed sheets for the guests began to accumulate. All these are items that will not be used everyday. That's very usual as we became lazier in keep things and cleaning the house up or when more people gets into our lives. Our house is beginning to look more and more untidy. Although our friends still said compared to their house, ours is considered clean but I would like to keep our house as clutter free as possible. Keeping the place free of un-used things makes it easier to clean and more difficult for dust and pest to grow. However, the garage or storage room will need to be well organized and tidy too to enable us to find things easily. Not to mention having good storage boxes is important as cardboard boxes actually allows pests like roaches to nest and grow. It will be nice to have some good garage storage solutions and tips to help on this area.