This is one of those clever. So simple, too! Use a kitchen paper towel holder for your garbage bags in the garage. Kitchen garbage bags could be placed on one of those upright paper towel holders for under the sink storage.
Crate Bookshelves: Find a wooden crate at craft store, paint any color you want, cut in half with table saw, attach hanging brackets with screws and attach to wall. Immediate eye catching book storage for little ones.