Instead of placing wooden shims under a table leg to level the top, you can stop the wobble permanently with clear tape and hot-melt glue.
Press on one side of the table so the short leg lifts off the ground. Wrap the end of the raised leg with tape so the wrapping extends from the end of the leg to the floor. The tape will form a cup. Now flip the table over and pour hot-melt glue into the cup of tape. When the glue dries, the table will be level again.
