The Arbor Knot is a good choice when attaching monofilament or fluorocarbon lines. This knot can be used for both baitcast or spinning reels.
Of course you can use this to attach braided lines to your reel, too, but the spool must be designed as a non-slip braid-ready spool. Or tie monofilament on first and fill the spool with 5-15 wraps before filling the spool with braid or other superlines.
