Usernames and Passwords

I do now that its getting very confusing with all the user names and passwords that we need to now to even get going every day. I think back ten years ago and I did not even need any of these then I started in the teaching profession. Know days I need then to log in to my computers, voice mails, e-mail's, wiki's, blog's and so on. When will it ever stop I personally think it going to get worse. The tech director at school sent the following link of an article about hackers. Because every year we need to change are passwords and people are always asking why.
http://www.nytimes.com/2010/01/21/technology/21password.html?em

One of the thing that I have been doing is using the same user name and password for all of my e-mails, wiki's and blog's. I know that this is probably wrong but it sure helps remembering everything.