port upgrading

[Dick Hoogendijk]

  I'm in doubt. I wanted to bring my ports collection uptodate, so I ran 
"csup -L 2 /root/ports-supfile" and that updated my ports collection. At 
least, I hope so.

Then I started googling and found that cvsup is not recommended. Better 
tot use portsnap (???)
And also portupgrade was a no go. I should be using portmaster.

Woh, I'm confused now.
Question: what is best used to have an up2date ports collection nowadays?
This system is FreeBSD8/amd64.