Here are some ideas, courtesy of an article written by Marty Tousley:
If you’re a writer, write - it could be an article, an anecdote, a story, a poem, a song, a letter, an obituary or a eulogy. If you don’t want to write for someone else, keep a private journal and write about your feelings as you journey through your grief.
Buy a very special candle, decorate it and light it in honor of your loved one.
Purchase a book - perhaps a children’s book - on coping with the loss of a loved one, and donate it to your local library or school. Ask the librarian to place a label inside the front cover inscribed “In memory of [your loved one's name].”
Plant a tree, bush, shrub, garden or flower bed as a permanent growing memorial to your beloved. Mark the site with a memorial plaque, marker, bench or statue.
Memorialize your beloved in cyberspace by lighting a virtual candle at Light a Candle Online.
Write a special note, letter, poem, wish or prayer to your beloved, go outside, attach the paper to a balloon and let it go - or place it in a vessel and burn it, and watch the smoke rise heavenward.
If you are harboring bad feelings or regrets, gather symbols to represent those hurtful or painful situations, events, or feelings from your past, place them in a container and hold a private burial or burning ceremony, saying goodbye and releasing them as you do so.
Ask relatives, friends, co-workers and neighbors to gather their contributions, and put together a scrapbook or box of memories containing mementoes, letters and photographs of your loved one.
Celebrate the life of your loved one by continuing favorite traditions or eating favorite foods.
Select a Valentine card that you wish your beloved would have picked for you, and mail it to yourself.
Give yourself a gift from your loved one that you always wished he or she would have given you, and think of your beloved whenever you use it or wear it.
Copyright - Marty Tousley (Article: http://opentohope.com/hope/dealing-with-grief/waiting-for-biophoto-of-marty-remembering-our-loved-ones-on-valentines-day/)