Don't get comfortable (romantically, sexually or otherwise).
At the start of your relationship, your aim was to get comfortable enough with one another that you could stop jumping through hoops and start wearing sweatpants during movie nights. Now that you've reached that stage, your aim is to get uncomfortable.
Hear us out. We're happy you no longer feel you need bandz to make her dance, and movie nights are now sufficient entertainment, but don't use your comfort as an excuse to slack on your game.
There's a fine line between comfort and boredom, and it's your job to make sure the relationship never makes that dangerous transition. Comfortable and exciting can be mutually exclusive.
Never stop trying to woo her. Keep yourself looking tight. Dress up for dates. Shave. Trim your damn nose hairs. And for the love of god, please don't discuss your bathroom habits. Some things are better left unsaid.