If your toilet is clogged, there are a few things you can try before calling a plumber. First, try using a plunger to see if that will clear the blockage. If that doesn't work, you can try using a toilet auger. Insert the auger into the toilet bowl and turn the handle until you feel resistance. Once you hit the obstruction, continue turning until it's clear. If neither of those methods work, you can try pouring boiling water into the toilet bowl. Be careful not to pour too much at once or it could splash back up at you. Finally, if all else fails, you can call a plumber to have them take care of it for you.