Tips for faster shingling

I am 18 and in very good shape. As far as physical fitness goes there is no reason I shouldn't be able to keep up with 99% of roofers.

I have been doing construction since I could drive and in that time have probably put on around 15 roofs. But due to lack of experience and knowledge I can't seem to keep up with one of the guys I work with who has a lot more experience but is not as physically fit.

I was just wondering what techniques you guys have found to make shingling faster.

For example: How do you end your rows? Some guys go flush with the drip edge some guys go 3/8 past? Some cut with a utility knife some nail the shingle then cut it with a shingle snip?

What do you guys do as far as chalking lines? How often? Do you chalk all lines before you start or chalk as you go?

How many rows do you start and then take through before finishing them out?

Any tips for nailing them faster?

Where do you keep your stack of shingles while nailing?

Thanks for the tips. I know that I take a lot more than I can give to these forums but I am thankful for your generosity in sharing all your wisdom.:thumbsup: