Sketching to the next level?

Update: Been at an internship at a small company (myself and one other design front most of the design work) for the past few months. I’ve been doing some furniture/graphic design and we started off sketching quite a bit, but recently it’s been computer graphics and now we’re actually building a trade show booth! Which is a good experience but my sketching has been getting rusty (so many things to do in a new, big city). So i sat down today and did some warmups and a sketch of my desk.