Warm your cups: your coffee will stay warmer longer. If your machine doesn’t have a cup warmer, you can just run your cups under hot water.
Brew one coffee at a time: even if your machine is very powerful, pulling one espresso at a time will make the coffee creamier and more delicious.
Use fresh water: your machine will work better if you use softened, filtered water, but your coffee will taste better if you use fresh water. Your reservoir doesn’t always need to be full, instead just fill it enough for your coffee.
Listen to your machine: if you forget to maintain your machine when it tells you to, you are significantly shortening the lifespan of a pretty expensive appliance. You’re also stopping it from working at its best.