I personally have not done much decorating for Valentine's Day, but I have found a lot of inspiration. Some eye candy for you. Enjoy.
A unique take on the traditional heart. I would guess it is made of either Lavender or Sage. Either way it would smell pleasant.
I actually have a branch from our birch tree that I used for pine cones during Christmas. I thought about leaving it up all year and decorate for the various seasons. I do like the puffed hearts. They could be made from felting and stuffed or simply craft papers.
Melt your children's busted crayons for a fun pin or a simple crayon for the little ones. These "pins" say "Happy Valentine's Day for Crayon Out Loud."
Votive filled with "sprinkles". You know the kind you use for decorating cookies. OR you could fill with beads, candy....so many options.
Hope you are inspired to decorate your home. When you are done you can come over and do mine. ;)