thing to do in this case is to divide the garage into different sections and put things accordingly. as an example, have a section for gardening supplies and another section for car tools. this way your garage will stay organized and you will know where to look for when you are trying to find something.
most of the things that wound up in the garage is a result of the garage being outside. trust me when i tell you that most of the things you got out there actually belong inside the house. a book collection does not belong in the garage. so, go through the entire garage and move things 