How to get "Show Desktop" icon?

Question:

"Tim, 


I have a quick question for you. I am running XP and I accidentally deleted my "Show Desktop" shortcut that is normally in my quick launch toolbar. I use this icon very frequently, and for the life of me, I can't figure out how to get it back. I even asked Google, and found nothing. Can you help?"

An alternate form of this question which I got a couple of weeks ago is:

"I have Windows 7, and I don't like having the "Shot Desktop" button be all the way over there on the right, and so small. How can I make a Show Desktop link, like I had in XP?"

I am sick of all this spam! Help!

Question:

"Tim, 


I have used the e-mail address provided by my ISP for years, and have been battling an ever more daunting tsunami of tspam, since the day I began! Finally, it has become too much! I'm dumping my ISP's e-mail, and I'm going to make a new one... but I don't want to lose touch with any of my friends. 
How can I make sure that my new inbox stays free of spam, and that my old friends can still get a hold of me?"

Click "Read more" to see the answer.