I read a blog that listed ways to cheer up a non-commercial blogger and this inspired me to expand the list: 

1. Comment on his/her post.
2. Send him/her a trackback by citing one of his post in yours.
3. Blogroll him/her.
4. Pass him/her a cool meme
5. Blogmark him/her
6. Send some traffic to his/her blog
7. Click on their ads

As a blogger, what would make your day complete? List your suggestions in the comments section of this post or you can trackback from your site.