Waiting on a phone call with a pen in your hand? Bored on a train? Chances are you'll doodle.
Consultant Graphologist Tracey Trussell has analysed the most common doodles and their meaning in a new piece of research for Samsung and while sketching squares express a down-to-earth nature, etching boxes is a sign of materialism.
Here she shares the psychology behind those inkings, so what do your mindless scribbles reveal about your inner psyche?
Circles: Drawing round shapes expresses the need to belong, love and be loved.
Squares: If you're etching squares then this expresses a down-to-earth, practical and constructive nature.
Triangles: Scribbling triangles? Tracey says this shows a dynamic, powerful and ambitious nature.
Hearts: One of the most common doodles, hearts are symbolic of love and romance, and tell of an affectionate and sentimental nature.
Webs: They may be more unusual and complex but drawing webs reveals calculating personalities who are good at enticing people into a particular situation.
Flowers: If your flower has a large circular centre, this expresses confidence and the enjoyment of a good social life. Meanwhile, carefully drawn flowers betray the obsessive-compulsive personality.
Boxes: It's not good news for anyone drawing boxes as Tracey believes that while this shows ambition, it can also be a sign of materialism.
Coils or spirals: Drawing these complicated shapes means doodlers thrive on variety, creativity and growth.