I did this when I was younger for pocket money, and can I just start by saying- slave labour! Omg the pay was pittance! Don't know if it's changed now, that was 10 years ago. I got about $2.60 per pamphlet. Took about 2 hours to fold and collate on average and about 3 1/2 hours do deliver. So 5 1/2 hours all up. Therefore if we only got 1 pamphlet that week the pay was essentially less than 50 cents and hour... I usually would get 6 different pamphlets though, so about $2.85 an hour. Still not much, even for a 12 year old.
However, the money did add up and I eventually had a nice little bank balance going.
I used to stuff as many pamphlets as I could into a backpack, I delivered in the area we lived in. I would get a map of the area you are delivering in and mark out a route, so you can avoid any backtracking. Dad usually helped with the folding, can I suggest you use a heavy bottom glass to get the creases in, otherwise your hands and fingers get very sore!!