The fact that you asked the question speaks volumes.
For me, I'm someone who needs words of affirmation, so I would like to explicitly be told that he appreciates me, that he values me, that he's thankful for having me in his life, that he's sorry for any pain he's caused me.
He has said these things in the past, but I need to be reminded occasionally with words. He's bigger on actions. I try to focus on his actions as "speaking" to me, but I still need the words.
More long, bear hugs couldn't hurt either. ;)