As some of you have probably heard me mention before, I used to write only in pencil. As a perfectionist, I could not handle writing in pen. If I made a mistake, that meant starting all over; whereas, with a pencil, I could just erase. Well, a couple years ago, my mom brought me home this:

Ever since this addition to my supplies, my world has changed. I have now almost 100% moved on to using pens. In fact, I have found that writing with a pen (especially while doing schoolwork) puts less strain on my hand. Plus, it leaves a more permanent mark. But, at the same time, that mark can be wited-out, if necessary. Consequently, I am very thankful for this tool.
In fact, I was just doing some statistics homework (and making mistakes) and this little bugger saved my paper.
Thanks, mom.