I used to chirp people who'd wear impeccable suits but paired them with Nikes (albeit color-coordinated, at least). 'What losers,' I'd think to myself. I am now a card-carrying member of that club.
2. Passive Aggression is King
...if you don't hold any real power. How you treat the support staff is a giant indicator of who you are. You may be an effective employee but an inadequate manager and disliked by the people who work 'below' you. If you can, avoid these people as they make your work life a toxic environment with their unnecessary attitude.
3. Respect is Earned, not Demanded
Usually, anybody who demands respect and has an issue with what they deem as disrespect will preemptively lash out first.
4. Seamless is your Best Friend; Yelp is your Other Half
Brown-bagging your lunch is the most economical way of doing things, but some days you will need to indulge that burrito craving at 4pm while your bum is firmly glued to your seat. Seamless, Seamless, Seamless. But always cross-reference with Yelp, first. Trust me.
5. EyeLeo will Save your Retinas
This program that's extraordinarily simple to use stays innocuous in the background, reminding you every now and then (after your specifications) to give your eyes a break. It even freezes your computer after a set time (again, by you) and makes you rest for a bit, or to take a water break. I'm guilty of pursuing that ultimate focused zone during my workday and not making enough time to come up for air, so having EyeLeo is very useful, especially as we are all now more computer-dependent.