One of the best ways to advertise Bitcoins

[Birdy]

http://www.reddit.com/r/Bitcoin/comments/1ffok8/redditwide_tipping_has_been_enabled_for_all_users/

Give people an amount of Bitcoins to start with ^^
I think Reddit tipping is able to have some impact.
E.g. Make creative people like musicians aware of this easy way to receive money.
(But don't annoy people with spamming lots of tiny tips or preaching please)