White objects sketching

To improve his or her sketching skills, an artist must perform life drawing exercises regularly. I also do the same. Last night I gathered some white things that I found in the kitchen and put them on the cover of Canon Pixma - my desktop printer. Then I took my A4 size sketchbook and Maries C7300-6 charcoal pencil to draw them. I feel that doing still life drawing is more challenging than drawing from photograph. An artist needs to create an imaginary boundaries for the subjects that he wants to "move" onto a paper. This can easily be done using a view finder but I don't use it. I prefer to set the boundaries using my own eyes and fingers. 

The first appliance that I drew was a Philips incandescent lamp.  Then I drew an emergency lamp behind it. The Philips water heater that I sketched on the top right was added as the third last object on the paper. There were some sentences around the heater symbol but I didn't draw them. The letters were too small for my charcoal pencil that had been blunt already.
In addition to drawing with charcoal and graphite pencils, I also like watercolor painting. However, the accuracy of pencils and the spontaneity of watercolor are the media that I most prefer. So, I use Derwent watercolor pencils to drawing and paint human figures, landscapes and animals for my artworks. I plan to showcase my works in etsy.com this year so that viewers who are interested in the artworks can order them from the website.