I have started to bow a lot when thanking and greeting people. Not big bows thankfully, but still. Sometimes I only bow when greeting people, I don't even say anything. I don't think that's the norm for a girl in the country where I live, but I can't remember how I used to greet or thank people before I started watching dramas.
I also have problems with being or not being polite. Like when I talk to my boss at work I'm like "do I have to bow when I enter his office?". And I try to remember how to talk politely/use polite phrases. Which is not really possible in my language, at least not in the same way as in Korean and Japanese that have different levels of politeness that use different speech patterns. This is also the case when talking to old people.
When talking to people younger than me I often find myself talking very informally to them, just to switch to talking more formally to people older than me.
I also use some Korean and Japanese words/exclamations when talking to myself.