When learning something new online, its often necessary to take copious notes, and possible in the process to lose the concepts in the minutia.   What if you always had a great screen capture program as near as your portable flash drive? 

FastStone Capture V 5.3

Capture

http://www.portablefreeware.com/?id=775

The other great use for screen capture programs is to grab a screen shot, annotate it sufficiently and send it to that computer challenged friend or relative.  Trust me, this saves alot of time and frustration - even if you have to send the initial instructions on paper and US postal.

There are later versions of Capture, but they aren’t totally free (for personal use)anymore.  I’ve used this for about a week and its proven very useful.  Not that hard to configure, yet has enough bells and whistles for most users.  Enjoy – and save some trees.  [for windows]

The latest version is here: 

 http://www.faststone.org/FSCaptureDetail.htm

Well worth the price if you want the later features or are using it for work.