/lit/ - Literature

How do I apply more of what I read to my daily life?
I've recently become unhappy with the person I am, at least in the small details when around others. I hate being around people and therefore when I am I try and act like I don't hate it.
An example of things I do that I find annoying would be like the other day. I was speaking to a classmate about a quiz we took and he told me he got a 100%, I jokingly said "you suck", because he got a higher grade than me. I obviously didn't mean anything by it and he and I both laughed at it. But I criticized myself in my head immediately after it. I don't even think I'm mad because I necessarily said it, but because it was the first thing I thought to say, not to congratulate him and say good job but to criticize.
Other things would be self-depreciating jokes. Inadvertently revealing too much of myself than I'd prefer people to know.
I get very annoyed and frustrated at myself on my drive home from social interactions. I've tried to apply more stoic philosophies to my life but when around others it's easier said than done.

How do you live stoically? What things do you do in your day to day?

Should you dive deeper into a select few authors you enjoy or jump around reading many different works by many different authors?