One tip for toilet wax ring replacement is to have some old towels or a piece of plastic sheeting ready on which to set the toilet. Another is to use a putty knife to scrape out the remains of the old wax ring after removing it.
When replacing a wax ring, it is a good idea to replace the water supply line and mounting hardware. These items are typically inexpensive. Use alcohol or mineral spirits to clean the old wax off the floor before installing the new wax ring. Take care when remounting the toilet. One tip is to attach drinking straws to each bolt before lowering the toilet onto them. The straws act as guides to help prevent damaging the new wax ring.