I call or talk to the person time permitting.

I recall the conversation between us or all the person's motions and this is like the movie clips playing in my head.

I look at the person's picture over and over again.

If I miss the person so bad, I usually will have a dream about the person at night

Sometimes I can do nothing so I just bear this feeling in my mind. I tried all of these when I was far away from home for the first time