Things I have found worth the money, and especially helpful in the art studio.
I love the matte finish of this mdium, as well as the smell. It dries faster than linseed oil and does not create an uneven surface sheen when working with oil paints.
Oil Painting Mediums | Fat Medium, Lean ... - Chelsea Classical Studio
I find it much easier to change the display in my studio since using this system, and I am not constantly putting new holes in the walls. Reasobably priced, and positive interactions with the company.
STAS picture hanging systems
I generaly paint large (over 24 x 24"), and I have found these to be consistent in color and quality without the higher cost of more expensive oil paints.
I have struggled getting the right light to my painting easel, even with directional track lighting and ceiling fixtures. This adjustable works great, easy to get the right light on the painting surface, and reasonably priced.
Clip-On LED Easel Lamp, 3 Modes, 10-Level Dim, 300lm, USB