Praise in the 21st century

Problem:
We teach in a time where praise of our students is acknowledge as uber important, but I found myself reflecting recently on the types of praise I use in the classroom and whether I was effective in this element.

2 scenarios were front of mind:

1. I had been commenting on blog posts of my class.
2. Had decided not to send a "postcard from your teacher" praising a boy for good start to the 1st 2 weeks of term because he'd ruined with some terrible behaviour on 1 day.

So, my thoughts:
What praise is the most effective? What praise do kids like receiving? 

I was impressed by Kauri's question, were we talking about 10 000 page views or comments, I inferred that he valued people commenting on blog posts.
Sara's excitement at being "favourited" on Twitter.
Had I done the right thing not sending the postcard?
I wonder how much praise I give in the classroom? How much is noticed by the students?


What forms of praise do I use?
Many of the traditional forms (located in the poster), but ones that are specific to our school include sending a "Postcard from your teacher" praising students for the positive behaviours for learning and writing children into the "Honours Book" for assembly. I also use the Class Dojo programme in my room, students are given points for positive behaviours only and the winner for 2 weeks gets a 15 minute free choice to be used in class.

The class loves ICT tools and they love the connection with other students/teachers, like me they feel good when they get page views, comments, retweets and favourites etc 

Action
I want to identify how much praise I give out in a day.
What praise do the students like the most, clearly it will be different for each child.

I will share results here. I'd love to know what praise your children find the most effective or ideas you're happy to share.