Quick up, on various methods on how to solder headers to PCB's
Drag soldering "Micro-Headers" :
[video:youtube:6DpvtISULgw]
ISP header
[video:youtube:4dMl6yRpMH8] more »
Not a bad video, shame about the ad's that obsure bits of it, but it does cover and show some important bits for thru hole soldering, even in a world of surface mount this is usefull :)[video:youtube:x0YxEilyQVY] more »