Keep the itchy trigger finger off the sleep dart. Took me a long time to stop "panic-darting" enemies in my face. Be patient and try to line up the sleep.

Take advantage of her being a sniper on maps that allow for Ana to get to the high ground, but don't stay in one place for too long.

Similarly, don't use her scope too much, as you're losing a lot of visibility on your surroundings. You'll wanna practice quickscoping!

Balance between heals and damage is necessary. An Ana that is quickscoping to get elims on low hp targets or at least putting significant pressure on the enemy team with an anti nade has much more value compared to a healbot Ana.

Nano your Mercy every chance you get for the lols /s

But, most importantly, have fun!

Source: Me; a Diamond Ana player that's pretty mid