Here are a few ideas for quick little Valentine's Day presents that a knitter could make.
You can personalize a Valentine's Day card with a little flat garter stitch heart:
Wah - sweet! Instructions are here.
You could throw a few littled felted hearts in with a box of chocolates:
Tee hee - those little eyes kill me!! Instructions are here.
For the more practical-minded, you could get some nice nice soap and give it with a knitted heart washcloth:
Enjoy! Give someone you love a hug.