“But sometimes you'll be flipping through the channels and come across something really interesting.”

You're in a conversation with a group of friends about your TV-watching habits. One person says that he prefers to

But sometimes you'll be flipping through the channels and come across something really interesting.

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“I generally try to keep up with what's going on.”

You're talking with a coworker who says that she's out of touch with pop culture. You pay attention to pop culture because you want to follow what people are talking about. You describe this to your coworker:

I generally try to keep up with what's going on.

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“I get distracted so easily!”

You were trying to find some information on your computer for a coworker. But while she was waiting, you noticed a new email message and started reading it. After you read it and wrote a short response, you say "sorry" to your coworker and then say this:

I get distracted so easily!

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“You remember how you used to always play that song on your dad's stereo?”

You run into a close childhood friend that you haven't seen in several years. You're talking to each other about the past. You remember something that happened to you a few times when you were both kids. You say:

You remember how you used to always play that song on your dad's stereo?

you remember (something)?

When you're asking a question to a friend or family member, you sometimes leave "do" out of the question. A more formal way to ask this question is:

Do you remember how you always used to play that song on your dad's stereo?

remember how (clause)

When you are remembering a past situation, you can say "remember that (something happened):

Do you remember that we dressed as super heroes for Halloween in fifth grade?

However, this only means to remember the fact that something happened. A good answer to this question would be just "yes" or "no". When you want to talk about remembering the experience of an event, you use "remember how (something happened)":

Do you remember how we dressed as super heroes for Halloween in fifth grade?

The proper response to this question is to describe some detail of that memory:

Yeah, I was Batman and you were Spider-man.

(someone) used to (do something)

You use the phrase "used to ___" when you're talking about memories of the past. It's used to describe something that you did several times — not just once or twice.