I have a cheapy sextant, it is fun! I just don't feel like I can apply alot of the information. Seems like it's one of those things that if you aren't using it everyday it's difficult to retain the knowledge.
Your finger tips are about 5 degrees which is about 20 min. Next time you watch the sunset see how many fingers you place between the horizon and the sun multiple by 20 that's how much daylight is left. Now if you know what time the sunsets you can figure the time.