Fly Fishing egg patterns called glo bugs are the easiest to learn how to fly but fairly difficult to master. Not to mention the waste of egg yarn. By making a simple tool out of a soda straw you can tie perfect glo bugs all day long with a minimum of waste. Tying globugs the old way I got about a dozen per foot of egg yarn, with the new tool I get 40+ per foot. Here's a youtube view of how I do it.
You can follow the steps here or you can go directly to youtube and watch a video on how to do it.