Some little ways to make love to someone on a frequent basis:

• Leave a single flower on their pillow.
• Send them a card in the mail, even if you're living together.
• Leave strange, non-sequitur-like messages on their voice mail.
• Write, using magnetic poetry, extremely explicit descriptions of what you'll do to them that night.
• Make dinner, do the cleanup afterwards, and treat them to a really nice dessert, "Just because".
• Draw a hot bubble bath, put some candles in the bathroom, and leave them there with a good book.
• Arrange for them to have a night out with their best friends, not counting you.
• Hide little presents here and there. Paperbacks, little pretty stones, etc.
• Chocolate.
• Take a sheet of cardboard and write/draw/expresswhat they mean to you, then cut it into a puzzle, and send it to them a piece at a time.

It's not my intention to make yet another GTKY node, so /msg me with suggestions, and they'll then be integrated.