I have two favorites:
My Ott lamp - I have two Ott floor lamps that I bought when JoAnn's had them for 50% off. One sits next to me in the Family Room for when I do any EPP or quilt binding. The other one sits next to my sewing machine to give me more light while sewing.
Frixion marking pens - These are awesome. I have a set of 8 different colors. Any lines you draw on your fabric disappear when you press your pieces. I use them all the time.