Great reminder Aaron, I always say I should upgrade at TE Command Post, but never have, I have the fre account but hardly ever use it lol.
I do however keep a spreadsheet of my own which allows me to remind myseolf to look at certain sites, I also in the sreadsheet track the avaerage time it takes to use up 1000 credits so I know that at X site I need to go and look every week or at X site its once a month etc :)