"How I live" relates to ethics and an awareness of one's impact on the world and on others (which, for me, includes non-human animals). No clear answers exist and people will have a wide degree of attitudes towards the question itself. In my experience, a lot of people have either never been exposed to the concept or, if so, they choose to ignore it altogether. The modern world has made it difficult to maintain a consistent ethical stance on just about everything, so that might be why.
It's difficult to explain in the abstract, so I'll try to give a pretty simple and down-to-earth example. I once roamed in the land of collectibles. I had that condition that makes one save things because "they might be worth something someday." This included things such as coins, comics books, trading cards, books, posters, just about anything. While exploring forums for collectibles, I noticed that people often celebrated openly when they were able to buy something for far less than its "true value." These situations usually arose when the person selling the object had no idea that they had something valuable to begin with, such as a person running a garage sale, or another less experienced collector, etc. For example, someone sees a box of baseball cards at a garage sale and notices a rare card worth $100 in it, but the box says "10 cents each." So they buy it, go home and post something on a forum like "this guy didn't even know what he had! I got it for 10 cents! The guy didn't even blink! He sold me a $100 card for 10 cents! Yee haaa!"
This might not seem like a big deal on the surface, and for most part it's not. The person had "10 cents" on the box and the person bought it for that. Where's the problem? The problem comes in when these same people will post about "getting ripped off" by car dealerships, stores, or other businesses of which they have little knowledge. For example, they say things like: "I bought the car and only then realized that I didn't know about the limitations on the extended warranty! I lost $100! Those #%$@%#$ didn't tell me! Those $%$%#%$!" In this situation, I see someone who has no problem "ripping people off," but they don't want to get "ripped off" themselves. Given how they themselves behaved in the first situation, they shouldn't be surprised that other people do the same thing. Why shouldn't the person instead think "heh... those car guys got me good, just like I got the guy with the $100 baseball card." Essentially, if you want to live in a world where people don't "rip you off," then don't "rip off" other people. If you want to live in a world where you can "rip people off" then you should fully expect others to do the same.
For me, one aspect of "living well" involves seeing that bigger picture and taking a consistent stance on it. Do you want to live in a world where you can "rip people off?" If so, then you have little reason to complain when others do it right back to you, because they're no better than you. If you want to live in a world where you don't get "ripped off," then don't "rip off" other people. I see so many people today who want it both ways: they want to "rip off" other people, but they don't want to get "ripped off" themselves. For me, that's not "living well," that's living inconsistently. That said, I know I don't live consistently all of the time myself, either, but I try to remain aware of that and live accordingly. That's what I mean by "living well," which then relates to the question of "how I live."
I'll give a personal example, and many people have considered me crazy for this, but it actually happened. Back when I collected coins, I went into a local coin shop and saw some ancient Roman coins in the case, but they had no price tags on them. I asked the man behind the counter if I could see them, since dealers often hide price tags underneath coins. He opened the case, but he couldn't find a price tag. He thought for a bit and finally said, "you know, the boss isn't in today, so let's just say $25." I looked at the coin and thought that wasn't enough, so I said to him "I don't think that's enough." He looked at me like he saw a ghost, then looked at the coin even longer. Finally, he said "how about $50?" I said "sure" and bought the coin. Why did I do that? Because I would hope someone would do the same for me if I was in that man's position. Is that silly and idealistic? Maybe, but for me it was living consistently. For me, that's more important than getting a $50 coin for $25. Would I have acted the same way if the coin had a value of a million dollars? Thankfully, I haven't been tested in such a situation yet, and I'm unlikely to be. But I can honestly say that I don't know how I would act. In any case, I try to keep an eye on how I live, even when alone and even in a crowd.