Add Brackets for Neat Stacks
Source: Organizing Good Things 2005
Prevent folded clothes and linens from toppling with wooden dividers. Choose shelf brackets with the long side measuring just less than the height of your shelf and the short side equal to or less than the depth; place the shorter side of each on the shelf and the longer side against the wall. To secure, drill two wood screws into each bracket from the shelf's underside.