Build a concrete pier you can move on your own.

OK so I don’t really have a need for a pier, but if I did need to make one, this would be a good way to make the base.  using tires for the form is great, and having the base one be “in” the tire makes it easier to move to where it needs to go.

http://www.instructables.com/id/Concrete-Tire-Piers/