Just my 2 cents... The solder 'tails' can also be a sign of the tip of your iron being dirty (accumulation of flux residue and impurities from the solder, etc). Make sure that every few connections you are cleaning your tip. A nice shiny tip heats the leads faster and keeps the solder from clinging to it when you move away from the connection. The best cleaner I have found can be had a Fry's too. Might pick one up while your there. I have the Hakko 599B, basically an aluminum housing that looks sorta like R2D2 after about 12 hours of soldering.

It uses a brass mesh kinda like a Brillo pad to clean the excess solder and junk off the tip. It doesn't cause the sudden drops in tip temperature like using a moist sponge does and is better at removing the flux residue.
Hope this helps some too.
Brian
PS: I am in no way affiliated with Fry's. Just found a good tip cleaner there.