whilst using a desktop environment
# svn update /usr/src
  check /usr/src/UPDATING
# cd /usr/src
# make -j3 buildkernel KERNCONF=GENERIC-NODEBUG
# make -j3 buildworld
  quit desktop environment
# cd /usr/src
# make installkernel KERNCONF=GENERIC-NODEBUG
# shutdown -r now
# cd /usr/src
# make installworld
# mergemaster -Ui
# shutdown -r now