On the sad nerdy serious tip its worth checking how any facebooktwitter comments come out saying posted by blackberry, Iphone or Mobile web etc.. I know they can be posted on the devices from the wifi while in your house but it might give a person an idea of your wherabouts/routine.. Thats possibly not so much of a worry for you (English2010) or me who are big n ugly enough to scare most people off with one lookbut some ladies may not need the ex or wannabe admirer knowing where they are..