Gmail - Mark All Unread Mail as Read

I'm a person like most others....who joined Gmail a long time back....and never cared to delete any of my emails...and neither did i care to read em all....

Consequently ... i have nearly 3000 emails in my gmail box from orkut,fb,linkedin and God knows where else.....

So a question pops up in my mind today.....'Is there a way to mark all of these as read so that i can get a proper count of 'new email' in my inbox?'

Steps

1. Open your Gmail Account

2. Click the Create a Filter link beside the search bar

3. In the Doesn't have: input box, type something wierd like kjdhaskf238098342

4. Click Next

5. Check Mark As Read option and also check the Apply to **** conversations

6. Click Create Filter button

And voila , your all done...

Finally some meaningful counts will show up on my inbox......