Replace the P-trap under a sink

The curved pipe under the sink, swapped for a new one. Cheap, quick, and it ends a slow drip.

Shut it off first

Shut off the water at the valves under the sink first, and wear gloves because drain water is dirty. Call a licensed plumber if the pipe coming out of the wall is metal and corroded, the new trap does not line up without forcing it, the joints are glued rather than slip nuts, or it still leaks after tightening.

What to buy — untick anything you have

Plumbing

1 Plastic P-trap kit with slip nutsKitchen sinks are almost always 1-1/2 in, bathroom sinks 1-1/4 in. A photo of the old trap helps.
1 pack of slip joint washers, assorted

Tools — already ticked off, since most people have them

Tools

1 Tongue-and-groove pliers· most people have this
1 Bucket and old towels· most people have this
1 pair of rubber gloves· most people have this

It lands in the shopping form, where you can edit anything and say what you think each thing costs. Nothing is ordered until you send it.

How it goes · about an hour · some experience

Shut off the valves under the sink so nobody runs the water mid-job, and put the bucket under the trap.
Loosen the two slip nuts by hand or with the pliers and let the trap drop into the bucket. It will be full of dirty water.
Hold the new trap up to the old one and trim or adjust the pieces so they match, then slide the nuts and washers on in the same order.
Fit the new trap and tighten the slip nuts hand-tight, then a quarter turn with the pliers. Plastic cracks if you overdo it.
Turn the water back on, run the sink full and let it drain, and check each nut with a dry paper towel.

Something else

Build a raised garden bed Mulch a flower bed Paint a room Put up garage shelving Fix a patchy lawn Build a fire pit Mount a TV on the wall Cookout for a crowd

Feeding people instead? The recipe book works the same way — pick a meal, say how many, every ingredient lands on the list.