if you're struggling, do standing post work. if you feel like you're struggling, it's probably because your own root isn't strong enough for you to feel centered while you're engaging an opponent.
then go out and find a tree that's young enough to be springy. a deciduous sapling with not too many branches is good for practicing limb control (touch branches with your hands) and base control (get your shin or knee up to the trunk). but a young pine or cedar works fine, too, and gives you more flexible points to practice your give-and-take on.
take the technique you want to practice and play it with the tree in a light centered way, without a lot of breaking force. you don't want to break the tree. you want to feel it. when you issue force, be whiplike about it.
low, concentrate on the place where your feet/shin/knees and the tree's lower trunk connect to develop your active root. high, concentrate on feeling how the tree's branches move under your hands (or elbows or shoulder).
move in and out of the technique you're trying to develop at different but constant speeds--and react to what the tree does back to you.
you can move in and out slowly or fast, and most trees will still kick your ass as thoroughly as a human opponent could. even though they're only standing on one leg.
just my two cents.
SERIOUS EDIT: if you're issuing and withdrawing at speed, be very mindful of protecting your eyes.
Last edited by johnrieber on Sat Mar 14, 2009 4:21 am, edited 1 time in total.