There is plenty of technical information put together in this long thread (given by gmaxwell explicitly, and DannyHamilton's analysis on which parts of the block header can be used as nonce, and my very old posts about modifications to the Bitcoin header) to ease you discover one of such tricks. Take some time to think about it, take aside all posts with personal insults, and you'll probably find the solution right in front of your eyes.
Be careful...you are stating that you known things that you are not disclosing...this will infuriate some people that will accuse you of threatening bitcoin security. Do you mean also that gmaxwell knows some tricks and he is not discussing them?
I believe anyone is free to discuss or not discuss whatever he knows. I also believe that the only way to discuss freely anything is not to be put in the position "You must prove that you are not a charlatan" position.