Watch what's being done around you - as I said before. Hey hoe, hey hoe!
If weeds aren't allowed to grow they don't set seed so the seed don't germinate so they don't grow so they don't set seed so you don't get weeds ad infinitum. Except of course things like twitch/couch grass or nettles. In that case dig up the roots, use a fork, not a spade, because a spade cuts up the roots and every little bit will grow. Get out all the white or yellow bits you can, and burn them.
Having said that,stinging nettle leaves are delicious, when lightly boiled 50/50 with spinach. They're full of iron, apparently!