My garage used to suffer from 'box-itis". We had boxes stacked 4-5 tall and two layers deep. Marking the boxes helped, but I finally bit the bullet and bought six of the rolling storage racks (6' tall x 6' wide). We also purchased those big, clear tubs to hold what was needed. Now it's no problem
getting to anything. If it's N the back, just roll a unit out of the way 2 get what you need. Make sure U store the heaviest items on the bottom shelves & the lighter ones on top. Don't climb on the racks. Husbands & boy-friends are designed to get stuff off the top shelves, utilize all your tools!