Hi Dave,
I saw a great method which I have just used, which was on one of the Gardner Carpwise Videos. Richard Gardner showed a method that not only makes it easy but also reduces line twist.
First, he makes up a full rod and pulls the line through all the eyes from the new spool and attaches it to his reel. Then he puts the spool where the line is coming from, on the floor on one of its ends so it does not roll around.You should then check which way the line goes onto your reel (clockwise or anti) and then look how it is coming off the spool on the floor. It should come off the spool on the floor the opposite way to reduce line twist i.e If your reel takes line on clockwise, it should be coming of the new spool anti clockwise. You then put your finger on the line and against your rod (abit like if you were going to cast it) and start reeling in your new line, keeping pressure on the line with your finger, so it sits snug on your reel spool.
It might sound abit complex (maybe that how I explained it) but it works very well and I have just loaded 3 reels using it and then line sits great and the line twist is much reduced.
If any of the above is unclear, please let me know.
Nick