Let's face it. Our Sensing function usually doesn't get any development until our 30s, at the earliest.
How do you deal with the real world of names, dates, and stubbed toes?
I think you're asking about dealing with concrete things in general, and not just names, dates, etc. All that sensorish stuff, right?
Honestly, it's just a matter of two things for me: importance and deadlines. For example, if I'm not up to having my ass chewed by my ENTJ mother about the state of my house, then I'll clean it before she shows up. If I feel like I don't give a rats' ass about her bitching, and am feeling more surly and independent, then I'll leave the place in its perpetual state of mild disarray.
Another example: I can't remember my best friend's birthday [I've guessed wrong for over a decade, simply because of numerical crosswiring in my brain -- three other people I know have birthdays around the same time, so meh, there's no hope]. My best friend [INFJ] completely understands that this is a particular flaw of mine, therefore the pressure is off of me to get the correct date [which lowers importance in my mind]. However, she IS my best friend, so I compromise: I have the entire month of November to randomly ambush her with birthday wishes. It's a method that works for us.
More on dates and suchlike: I'm never late with bills, etc. because early on I saw the complete idiocy of such behavior -- in other words, it's a deadline AND it's important to me that those bastards don't get another goddamn dime outta me. If I'm touring/gigging/etc. and have to remember flight times/venues/performance times, I usually wait until the last minute beforehand and have entrusted the details to an SJ who reminds me of the specifics so that there's very little time for the information to fall out of my head before the deadline passes.
The names thing isn't my forte either, but I usually have no trouble remembering a person's face, which cues up previous conversational details [which are easier for me to remember]. I'll then ask questions using the info in my mental "database" to carry me through the name bit: "Hey -- how's your laborador?", "Did you enjoy that trip to Europe?", "Is your daughter finished with college?", etc. Most people don't even realize that I've got no clue what their name is after a few exchanges like that [and it's always easy to get the information from someone else if it becomes important to do so]. Honestly, I think [like Jen mentions] that using a person's name is somehow too forward anyway.
Physicalities: again a matter of importance and/or deadline. If I don't have anywhere to go, and feel like being in pjs for three days straight, then by god, that's what I'll do. If there's a dinner party I've got to go to, well then I'll drag my sorry ass to the shower so that I don't smell like a barnyard.
blahblahblahblah. Enough of this -- coffee has become more important than writing more of this post...
*wanders off*