How can I create a homemade garage bike rack that is both functional and space-saving?

To create a homemade garage bike rack that is functional and space-saving, you can use materials like wood or metal to build a wall-mounted rack with hooks or slots to hang the bikes vertically. Make sure to measure the spacing between the hooks or slots to accommodate different bike sizes. Additionally, consider adding shelves or storage bins for bike accessories like helmets and locks to maximize space efficiency.