I became interested in heads up play a few months ago and asked a similar question, it seems there isnt many posts or information out there that covers heads up play. The higher limits get more posts about it then the lower levels do but overall there seems to be a shortage of information. Overall I just put in a lot of hours at the table and gradually became more comfortable in my abilities, I think thats the best way to go, but as far as available information there seems to be a lack of it. Good Luck