Use Gmail to find who sends you spam.

"When you give your email address to a website, you hope that they don't sell or trade your address to a bunch of spammers. Well if they do, here is a simple way to see what sites are responsible for what particular piece of email. This requires you have a Gmail account.

If your Gmail login name was username@gmail.com and you went to samplesite.com to fill out a registration form, instead of just entering username@gmail.com as your email, enter it asusername+samplesitecom@gmail.com instead. When Gmail sees a "+" in an email address, it uses all the characters to the left of the plus sign to know who to send it to. In this example it would still send it to username@gmail.com.

Now whats cool is if you search Gmail for username+samplesitecom, you will see all massages that were sent to that email address.

To see who is responsible for sending a specific message click the Show Details link and you will see the complete address"

copied from diTii.com 

Change your RDP Port

This tip works for Windows XP.

Why would you want to change the listening port for Remote Desktop (RDP)? I only have one IP address through my ISP but multiple computers that I want to have direct access to. (as opposed to multiple remote hops) Since I have only one IP but nearly limitless ports, I can take advantage of this feature.

Instead of using the default port 3389, I can manually change it to another port such as 3390 or 3391, as many as my router will allow. Microsoft explains the process in two knowledge base articles.

To change the listening port on the RDP server (the computer being accessed) follow these instructions: KB306759

On the client side simply append a colon and the port number to the computer name. ex: 10.10.10.1:3390 KB304304