upcoming 9.0 release

[Dick Hoogendijk]

Setting up plans for the upcoming 9.0 release I have one question. 
Assuming the freebsd-update utility will bring me from the 8.2-release 
to the new 9.0-release I'm not sure what to do exactly with the 
installed ports.

I always use portmaster. What steps do I take to get from installed 
ports on 8.2-release to 9.0?
Is there a nice and working procedure to follow?
Thanks for the advice.