I'm a big fan of Grazia magazine - it's my favourite weekly magazine. I like the way its different every week and one regular piece that really interests me is the debates they have on an issue that has arisen from the news that week.
They ask their followers to give their opinions on whatever topic is being discussed. The topics are not always relevant to me (anything to do with working in an office, for example) but the debate from Issue 267 (3rd May 2010) was something I have experience in and felt strongly about. So, I tweeted them, and my tweet was printed.