RE: Tips on holding steady
You don't want to hold completely steady. It isn't natural.
You've got something called a natural 'arc of movement' when aiming with a bow, pistol, rifle, etc. With some people it is an up and down type motion, with others it's a left and right motion. Either way, it's what you want.
Many people believe that in order to be accurate you have to hold completely steady on target, so when you wavier a bit your initial reaction is to jerk the bow back into place causing extra stress on muscles that are already being stressed from holding the weight of your bow at full draw.
In any case, this isn't a 'problem' you should worry about correcting. Only a small percentage of archers can actually hold completely steady on a target. A very small portion.