its not reading disks what should i do?

oh crap that sucks ..........
try this site www.wiierror.com see if it can help you

Get a Wii that's not so clumsy.

Seriously, though, that SUCKS! Try calling Nintendo and say it just stopped in the middle of a game?

^yeah i might do that,cause if i tell them it fell they probably wont fix it

how did it fell?

 well when i was gonna challenge my cousikn in SSBB,he stepped on the gc controller wire and it dropped the wii

UNLUCKKY!

^i know i was just about to play SSBB :'(

 Wii-tirement time for your console...

If it's something minor like the laser was knocked out of adjustment you could try opening it up and fixing it - I did that with my PS2 when it quit reading discs and it solved the problem. You also might be able to return it as a failed unit as long as there's no obvious sign of the console being dropped, or have it repaired under warranty.  I don't know what Nintendo's repair policies are, but nearly every other warranty for electronics will not repair items that were dropped or given an accidental bath in a puddle.

I was just about to challenge you in the Brawl league

and beat you