I have one broad tip. Be methodical and consistent. There are a lot of little points in technique that people will recommend. But what ever you end up doing when it comes to the small specifics. Decide on an approach before you start. In my experience what will get you the worst results is not having your mind made up about what exactly you are doing in a given sharpening session.
For instance: Starting out with a single pass on each side, before alternating to the other side; But then at some point, finding that you have slipped into making 2-3 passes on a given side, before you flip it over. Or even doing more passes on one side than the other. As apposed to deciding before hand that you will only use a set number of passes per side before turning it over and not allowing yourself to deviate from that.
I am not saying that you should never change your method. Just not within a single session. If you get a bad result. Having at least gotten a bad result with a consistent method, will help you remember exactly what you did. And it will help you consciously decide what to change with your next attempt. And when you start to get good results, it won't be an accident or a mystery as to how you managed that. You will know exactly what is making things better and what is making things worse.