Appreciate people before nostalgia has to introduce their importance.

Nostalgia is a late messenger. It arrives once someone is gone or distant and explains, with painful clarity, what they were to you. That information was available the whole time, and the only difference is that nothing forced you to look at it.

Think of someone currently in your life who you suspect you will one day miss. Give them a portion of the attention that hindsight would eventually assign. A call, an afternoon, a real question. Do it while it is still ordinary rather than significant.