What do you do with the money your earn from your commissions?

The only thing I purchased online out of luxury with my commission money is my palette ($11).  There are times where I have to use the money I’ve earned to make giclee prints or make personal payments (SATs, College Apps, Volunteers, etc.).  Unfortunately, commissions are my only source of obtaining money at the moment because I’m unable to get a part-time job due to family circumstances.  I’m trying to save up for a big lot of Winsor & Newton artist grade watercolors and Fabriano hot press watercolor paper, along with an X series Thinkpad for when I go to college.  So I guess all I’ve been doing is saving up money really. xD