My most favourite (and most beneficial!!) pointer i got from a lady was "sit on your pockets" it makes you sit a lot straighter in the saddle. In english, your hands are held up relatively high and a straight line from your elbow to the bit (as you've probably been told a MILLION times!!). Your lower leg is also more underneath you (as you're coming from western into english, your lower leg may tend to want to push forward, which in turn pushes you out of correct position and makes you lean back.) Just remeber, hands UP knees DOWN (which pushes your heels down. Try it!!) and most of all RELAX!! haha, it will feel very uncomfortable and a bit unco for the first week or so because you're basically reshifting your weight and therefore you balance and asking your body to do something its not used to. A lot of people think western and english are virtually the same, but i personally think they're very VERY different. You use different muscles, hold your arms and legs in different positions and ride in a completely different style. But have fun,, and keep it happy!! Good luck!!