I am as forgetful as anything.
I love my flash drive that I got for Christmas...it makes taking a great deal of files with me extremely easy--genealogy files, presentations, etc.
The problem is that I am ALWAYS afraid I'm going to leave it somewhere, especially plugged into some laptop in a cybercafe like I'm in right now in Nashville. To reduce the chance of leaving it, I have the strap around my wrist as it is plugged in and as I'm typing. The strap is a constant reminder.
Now just to find a "trick" to not leave it in a machine when I'm making a presentation where I'm not "at" the machine constantly...