Basic green decks

Get your mana out early. Don't wait around until the fourth round to start casting wild growth or natures lore. If you get a couple of extra mana sources out early in the game you'll have a greater advantage going into the third and fourth rounds. Don't stop. If you have the advantage with green keep it up. Don't take a "breather" and cast more mana spells or lay down an unneccesary enchantment. Always use your creature enhancers early. If you can hit your rogue elephant witha giant growth in the second round you'll put a dent in your opponants life total that is not easy to replace. You might also make him put out a creature that he may not have wanted to just to block you from doing that twice. Hit him hard and do it early. Green's speed is meant to be used that way. Do whatever you can to him in the early goings of the game. If you can bring his life total down to about 10 by the fourth round you've all but won the game. It is very hard to recover from heavy amounts of early damage use it to your advantage.