As my bard is getting into his "teens", it occurred to me that a +6/+1/+2 CHA weapon may be a good idea. Even though he already has Katra's Wit.
1. Always hold it while shrining. That gives me extra SP. I use them up right away on buffing, so switching weapons is not a big deal -- just remember to pick it up at the next shrine. Keep Katra's Wit -- I don't want CHA to drop too much.
2. Always pick it up before playing fascinate-type songs. On my hotbar I have Gwylan's Blade in 3, <current item> of Performing in 4, and quest-appropriate song (Enthrall, Music of the Dead, etc.) in 5. To fascinate, I hit 3-4-5. So make "3" a two-weapon set -- Gwylan's Blade and +9 CHA something.
3. Haggle and UMD. Obvious.