I'm helping to form a team that is really just a weekly activity - we get together once a week and send someone a huge bunch of supportive messages and goodies and blog comments. It's simple - we find someone who needs support and we give it. It helps if it's a substantive comment, but even a "Keep Pushin!" emoticon is nice. You can comment on an SP page, on a blog post, or even send an SP Mailer note. Just do something to let our person of the week know they have support and that people out here want to help them!
If you are interested, come over and see how the team works at teams.sparkpeople.com/lovebomb