Remove the fish and put them in a suitable container. Drain as much of the water as you can. Cover the plants with a wet towel or paper towels, try not to crush them. For a small tank like this, cover it with plastic cling wrap. If you can, slide the tank onto a very rigid piece of material large enough to support the entire bottom of the tank, lifting from the bottom if necessary. Pick everything up carefully and move.
This assumes that you will be able to refill the tank within 48 hours. Good luck!