Put the line on the spool using the directions from the manufacturer. It is easy to put the line on backwards with the coil going in the wrong direction. if you put the line on backwards, it will plague you for the entire time you use the line.
With spinning reels, don't reel the spool against the drag when a fish is taking line, let him go. When you can gain a little, lift your rod to move the fish toward you, then reel and lower the rod at the same time to take up the line.