My tip reduces the number of times you need to lug the watering can.

Buy some big cheap terracotta pots and seal the hole in the bottom with waterproof adhesive and a peice of slate or some such. Sink the pot in the ground fill it with water and cover it. Plant things like lettuce or cabbage round it and the water will seep out slowly keeping the roots moist. The pots only need to be refilled about once a week. Works a treat!

But don't forget to take the pots out of the ground in the winter they won't be frost proof.

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Gardening requires a lot of water - most of it in the form of perspiration. Lou Erickson, critic and poet