The obvious: living in Spanish.
The slightly less obvious:
- Starting lunch (the main meal of the day) with soup (doesn't matter what month or season)
- Always dressing in layers or at least bringing a jacket since the day will most likely be both hot and chilly/cold at some point (though my idea of extremes has changed as well)
- Vendors are a normal part of any subway commute and between vendors on the metro and on the street the variety of products you can buy without ever entering a store is rather impressive (What do you need? A pen? A snack? Nail polish? Gum? CDs? Sunglasses? Books? Toys? Batteries? A map of the city?)
- Always disinfecting fruits and vegetables before eating them
- It takes a long time to get basically anywhere in the city. It takes you 30 minutes? Oh, you must live close by. It took you an hour? Nothing noteworthy.
- I tend to choose room temperature water over cold water now because cold is just too cold! (The drinking purified / bottled water was already a given, right?)
- Tacos or sandwiches are acceptable for any meal of the day, including breakfast (this also goes for various soups and stews which are served as breakfast foods, especially as good the-morning-after-drinking breakfasts)
I was thinking about these various aspects of day-to-day life and was feeling pretty proud of myself for adapting to my life in the DF....and then I realized I was going the wrong way on the metro.
Oh yea, and I'm still a wimp when it comes to spicy foods and I still get frustrated when people walk too slow (especially while they take up the whole sidewalk while doing so). Meh - you win some, you lose some.