You are probably going to encounter an error or two along the way, when you see such sorts of massages like: dependency issues or some gstreamer lib couldn't be installed, relax, don't panic it's usually just means that some packages couldn't be installed (yet) because they are dependent on other packages.
What you should do
Is resolve these error with 1 of 2 options:
apt-get -f upgradeit tells your Terminal to try proceed with the upgrade - but only to install packages that aren't replacing other existing packages.
apt-get -f dist-upgradethis tells your Terminal to proceed with the upgrade and install everything (including packages that replaces other ones).
Always start with option # 1 and after it's done use option # 2.
After you used both options, the upgrading process should finish (if not, check your sources.list for misspellings and try switching to squeeze and back again), but it won't be complete. To complete it you will need to restart your system > login (through the new kernel) to your almost completely upgraded system > enter Terminal as root again and: apt-get update , apt-get upgrade , apt get dist-upgrade . this will complete your upgrade.
Enjoy your new system!!!
return to part 1
Edit: I would be thankful if you let me know whether the upgrade was successful or not in the comments below or on the youtube channel.