I'm a very good liar now. Throughout my childhood and teenage years, my parents punished for things I did regardless of whether I told the truth or lied. So if I lied, I had a somewhat decent chance of getting away scot-free. If I told the truth, my chance was slim to bupkus. Lying was pretty much a necessity the whole time I was growing up. As with learning how to do anything else, I messed up a lot at first (i.e., got caught and punished). But I persisted, and became the good liar that I am today. Now I can lie to just about anyone, and I mean anyone: my parents, my friends (very rarely), salespeople, my bosses, even police officers. I harness the aspects of AS, such as having an unemotional voice and facial expression, and use them for my own benefit. In the past three years, I was only caught four times out of the hundreds of lies I told.
If you want to be able to pass of your lies as truth, here are some tips I can offer you. We aspies have to stick together if we want to thrive in the hostile NT world. So I'm doing my part.
Talk in a flat voice with a straight face. This should be easy if you harness those aspects of your AS. At the same time, use proper body language. For instance, shake your head when you say you didn't do something.
Remember to destroy all evidence properly. If you ate a candy bar when you weren't allowed to, don't just throw the wrapper into the trash. Bury in the backyard (I'm serious), burn it in the fireplace, or throw it into a sewer grate.
Have a compelte story to back up your lie. Make sure you have an answer to any question your parents might ask you about what you did. Have physical evidence (like a used bus ticket or something) if you need to.
Have a few little inaccuracies in the story here or there, so it sounds more believable. If the story sounds too "perfect," people will think you made it up.
Make your story sound as vague as possible. For instance, don't say "going out to such and such a place with so and so". Instead, say "going out".