Re: Clogged bathroom sink
Channel locks or pipe wrench that is large enough to fit the fittings. Use a dishpan under the trap and drain to catch any residual water and debris that will come out when you start opening up the drain fittings.
Before you go to all this trouble, however, try this. If your sink drains, but very slowly, it could be hair and debris caught on the stopper plunger and rod. Reach around behind the drain neck under the sink and unscrew the rod, hang onto the stopper in the sink at the same time you pull the rod out of the drain neck. Clean both to remove hair and sludge. Use a flashlight to look down into the drain from inside the sink, you'll probably find a pretty good plug of hair and sludge. Use tweazers or needle nosed pliers to reach down and pull it out. Reassemble the stopper and run the water to flush any remnants down the system. If you have family members with long hair, this is likely the problem.
Good luck and report back with your results. :)