Silly as it sounds, keep the air clearer really clean.. They block up fast, and as they age and spit back more mix, the filter gets coated in mix oil fast. Keep a second filter in your pocket.
I often see a 1500prm difference between a clean and moderately dirty air filter.
Other WILL differ, but the simple mods (mufflers, carb adjust etc) don't do much for the 200t - it's already a pretty perky engine. If you are not in a dry area and can legally operate your saw without a spark arrester, that will make a small difference.
While adjusting the carb, watch out for over-speeding the engine. It's really easy get these wound up to 16-17.5k... and that's too fast and lean imho... Keep it below 15k..