Here is a composition of sketchbooks that I have done for a drawing class. Feel free to take a look around. Don't think that your sketches always have to be perfect because sketches are just there to toss around ideas and think of something beautiful to draw. Make sure to take the time to really draw in your sketchbook and observe the surrounding environment around you. Really take the time to view all the things you haven't gotten to or was constantly miss about the world.