I like pinning things to my Windows 7 task bar (well, everyone needs a hobby I suppose). It provides quick access to the programs that I use most often. However, I found a snag with doing this, which was that it was hard to start a second copy of the program pinned on the task bar. If you press the icon on the task bar once the program is running you get sent to the open program, it doesn’t start another one.
Then, by mistake I found the answer today. If you right click on the icon in the task bar you get a menu the option to run another copy of the program. Very useful.