Watersoluble Ink

Find a pen with watersoluble ink, like a fine liner or marker (I'm pretty sure you have one in your stash of art supplies!), use it to make a drawing. Then use a brush and water to play with diluting ink, adding shading and other fun bits.

Same But Different

Does it ever happen that you're ready to draw, you have your sketchbook open, you sip from the drink you poured yourself... and then you don't know WHAT to draw?