Hi Brian,
I actually wrote a beginners learning RC course here:
http://www.oz********.com/2007/03/le...ers-guide.html
There's about 10 parts, and you are probably beyond much of it, but reading through it may answer some of your questions.
W.r.t. landings and running long the key thing is minimising your airspeed when you land. The rule is Elevator controls airspeed, throttle controls rate of descent (counter intuitive isn't it). On your approach you need to throttle right back to just above stall speed, so the aircraft naturally loses altitude, but doesn't stall. Now with the throttle set you use the elevator, slightly nose down to increase airspeed, or slightly nose up to decrease airspeed. Once you do this two things will happen - it will become much much harder to hit your aiming point for landing than when you just pointed the plane where you wanted to land, but when you arrive at your landing point you will be going slowly enough that your plane will settle down and come to a stop quite quickly.
Cheers,
Oz.