The next exercises will help you to get a steadier hand. If you need to, go back to the natural rhythm exercise again before attempting this. The more relaxed, confident and in rhythm you are, the better the lines and dots will be. Try to repeat these at least four times each.
Now try and draw some interconnecting and crossing lines. No real pattern is needed here. Just try to cross over some lines and then draw another line threw the place they meet. This is a great exercise for getting good at drawing perspective lines.