putting line onto a spool

It might sound daft but what is the best way to put new line onto a f/s, it always looks a bit loose when i try.

when i snag it bites into the line on the spool.

Any tips

keep tension on the line, run it thro your fingers or mouth...or get a berkley spooling station

This is how i usually do...
Fix your reel to the rod,use any short two piece rod that u can find,and you gonna need the bottom parts of the rod,not the one whole length of the rod.
Run the end line from your new spool through the stripper guide/bottom end ring,and tie it to the arbor of your reel spool.
Fill a water bout 1/2 of bucket,dump the new spool of line in that bucket.Hold the rods using ur right hand (consider ur using ur left hand to crank)in between the reel and the stripper guide,using the same hand,pinch ur line with enuff tension to make it tight on the spool,but not too tight.Use ur left hand to crank the reel,not too slow and not too fast,just enuff so that the spool in the bucket spin in vertical position so the line wont get too much twist.

Run the line through the telephone book sitting on the floor.

For me its nail in the side of the shed, spool on the nail and run the line through the eyes on the bottom half of the rod and tied unto the reel. Wrap a damp cloth around the line and hold it against the rod between the bottom eye and reel. Then just keep some tension on and wind it on.