How to keep FreeBSD System up to Date

A good summary of the tools to keep the FREEBSD System up to date, can be found here
http://www.cyberciti.biz/tips/howto-keep-freebsd-system-upto-date.html
http://www.cyberciti.biz/tips/howto-keep-freebsd-system-upto-date.html
Upgrade FreeBSD ports collection
Run portsnap as follows:
# portsnap fetch extract
Display outdated ports list
You can list outdated ports list with pkg_version command:
# pkg_version -vIL=
OR
# pkg_version -vIL'<'