Hide love notes for your partner to find when you are not around. You could hide them in a coat pocket, briefcase, purse or even a drawer. This will remind them of you and show them how important that they are to you.
Call or text your partner to tell them that you've just heard a song that reminds you of them. Each time they hear that song, they will be reminded of the way you feel about them.
Buy your partner a real greeting card, write down your feelings and drop it in the mail. When it arrives, they will appreciate the time you took to shop for a card, write down your feelings and mail it. It will be a keepsake and really stand out from the modern day texts and emails that we've become so used to.
Recreate your first date. Surprise your mate with the exact date that started your relationship. They will never forget the gesture and you'll make wonderful memories.
Make a list of the reasons that you love your partner. Have it printed nicely, frame it and surprise them. Make it specific to your love. They will know you put a lot of thought into it and they will cherish it forever. It will be a reminder to you both about the reasons you fell in love.