Lightening your load
If you have a very big pot and want to lighten the load, cover the hole in the pot, for me usually a much used scourer (I glue mine down, so nothing escapes and it doesn't move.)
1. Place a thick layer of Peat moss or cocobark in the bottom, it holds the water before it escapes.
2. Put a pile of corks (have to drink a lot to do this) or alternatively a heap of polystyrene beads.
3. Fill the pot with dirt and then plant.
Some very good ideas Sandi
...especially one about the corks LOL
My big pots do not get moved .. at least not by me these days
.... they go into their situ and get filled on the spot.
I also add water crystals in the bottom.