I try to let my husband know that I love and appreciate him as often as possible. There are a couple of ways I do this:
1. I send him an email most days, wishing him a good day and telling him I miss him. On Fridays, I tell him I'm looking forward to spending time with him on the weekends :)
2. When he's worked hard on a project around the house, I make a point of telling him "thank you" and pointing out what a good job he did, or how good the project looks.
3. If he's leaving on a trip, I sneak a card into his suitcase or briefcase, and tell him I'm going to miss him, but I hope he has a good time!