Keep things simple. The more complicated a system is, the less likely it is to be used.

If you can’t find a pair of scissors when you need it, it’s because either you or someone else put it down in a odd place. Go to the local supermarket, find the stationery or kids’ aisle and marvel at how cheap a pair of scissors can be.  Now set about buying enough pairs that you can have one in every room of the house.