1) Make sure that your washing machine and your floor are completely level.
2) Take care to add your dirty washing is spread out evenly when you load it.
3) Try different wash cycles to find the one that is best for you.
Davie-Boycat, April 2011
take out the transit bolts
chick, April 2011
edit
I can answer this question...
How can i stop my washing machine moving across floor?