Keystroke logging (often called keylogging) is the action of tracking (or logging) the keys struck on a keyboard, typically in a covert manner so that the person using the keyboard is unaware that their actions are being monitored.
There are many ways to use keyloggers. i will be going over 2 ways. One way involves leaving the usb disk in the computer for the full duration of recording time. The other involves plugging it in starting a program on the computer and unplugging the devise. the computer will record until stopped and u can retrieve the information next time you get on the computer alone.
Step 1: Pick Your Flash Drive
Over the years flash drives have gotten smaller physically and bigger in capacity. Depending on your access to the target computer and the type of keylogger you use will determine the size of flash drive you will need. For instance if you are capable of accessing the target computer multiple times a day and are using a program that only records text, you can use a 1gb drive as you can retrieve data as needed. if your using a keylogger that takes screenshots you will need a bigger drive to store the screenshots.
Step 2: Know Your Target.
This step (branching off the last) will determine what program and what size drive you use. If you can access the target computer multiple times a day but cant hide the drive you could use a smaller drive to pull the files off as needed. if you can hide the drive you could use a bigger one with a program to also take screenshots. if u rarely have access you might want to use a program that will record on the computer and a drive big enough to hold the files when transferred.
A basic Keylogger that records text only where the drive must remain in the computer can be downloaded here: http://www.mediafire.com/?f42j4zetr668daz
A keylogger which will run off a flash drive then u can remove the flash drive till u can retrieve the data can be downloaded here : http://www.mediafire.com/?y4vp04kjlwbli2u
If you cannot acces the computer to load a program and only wish to record text you can buy a Hardware ps/2 or usb keylogger. they automatically record incoming keystrokes from the keyboard then pass them on to the computer. they work by plugging into your computer then plugging the keyboard into the hardware keylogger. the data can then be retrieved by unplugging it plugging it back into your computer and hitting a key combination to show the files on the computer.
you can find these by simply typing Hardware keylogger in google or the search engine of your choice.
This was my first instructable so please don't be to harsh =)
Step 4: Alternatives
If you have a gaming keyboard with a quick macro function like me you could always activate quick macro to record keystrokes then view it later ;)