Give the bathroom a quick—and quiet—upgrade by replacing the toilet seat with a soft-close model. Remove the old seat and line up the new seat on the top of the bowl. Push the included plugs into the holes on the underside of the bowl. Slip a washer on to each plastic bolt and screw the bolts into place by hand. To help keep the seat in place, thread rubber bushings (about $1.50 each; at hardware stores) onto each bolt before tightening the nut. You can also install a set of stabilizers (Safe-T-Bumpers, about $5 for two; amazon.com
) on the underside of the seat to prevent the side-to-side movement that can cause it to come loose.