Pullup Program info (as seen in old fitness thread, with a few add ons):
In the meantime, one of the BEST programs for improving pullups is "grease the groove"
Basically its like this. Throughout the day, you do lower rep sets (every hour if possible).
Example: if you can do 5 good reps, you would do 1 set of 3-4 every hour for like 5 days. Now, things happen and you may get your reps at 8, 9, 10am and then nothing til 1pm, 2pm, 3pm, 4pm and then 7pm, 8pm. Thats fine. Just realize it only takes a few seconds to get 3-4 reps and you can do them on anything that you can hang from-tree branch, scaffolding, pullup bar, etc etc. Try to get at least 10 sets a day.
Anyways, do this for 5 days then rest on day 6 and test yourself on day 7.
Repeat this for 2-3 weeks. Dont do any other back exercise durig that time.
I can attest to GTG working and so ca JStorm.
It took me from 12 to 20 and took him from 5 to 10.
Here is another program that is supposed to be very good but I have no personal experience with it. It is scaled so anyone at any level (even if you cant get a single pullup) can complete it:
http://twentypullups.com/
Other programs:
Recon Ron: (you must be able to do 6 pullups before starting)
http://www.leatherneck.com/forums/showthread.php?t=28822
Armstrong Pullup program:
http://www.4mcd.usmc.mil/AOP/OSOHyattsville/Armstrong Pullup Program.htm
Lastly, if you only want to work pullups 2-3 times a week, then do ladders.
do 1 rep, rest, 2 reps, rest...up to almost your max...then come back down the ladder...3 reps, rest, 2 reps, rest, 1 rep.
Vary your grip positions for some new challenges as well.
Remember, with pullups, your palms face away from you.
Go wide, narrow, chinups, commando, etc
Total Volume is key to adding reps.