Nicholas Sparks' love letter writing tips:
Describe your location, your mood and even your apparel as you write.
Tell your sweetheart why you're writing.
Recall an earlier time, and say what you remember most about that day and why it means so much to you.
Tell your beloved why you love him/her and be specific...e.g. "I love you because you never yell at me when I snore."
For a strong closer, use any variation of: I love you now, or I never even knew what love was until I met you, or I'll always love you.
Trish McDermott's e-mail communication tips:
Set the mood with the subject line.
If a friendship is evolving into something more, introduce romantic exchanges gradually.
Always respond promptly to any romantic exchanges you wish to encourage.
Write about feelings, not facts.
Tease and banter.
Pay attention to the day-to-day details of your special someone's life...e.g. "I imagine you sitting at your antique pine desk, sipping your peppermint tea...."
Get physical... e.g. "Across all these miles, I am reaching out and taking your hand."
Above all, be courageous! Write and send that romantic e-mail regardless of your expertise. The real measure of romance is in the effort you make.