To address the comments on items and planning your character around them. My only suggestion would be to not depend on them for you primary ability needs. You never know if/when you'll have your gear taken from you for story reasons and you don't want to be hobbled because of it.
My suggestion would be to use them in ways that supplement you rather than become a dependency. E.g. As a Bard, I may not choose any intelligence based skill proficiencies, because I know I can get the headband with +3 intelligence and add from my +1 from Jack of all trades. However, I wouldn't depend on a Lute of 18 Charisma, because if set my Cha to 12 knowing I would get the lute, I could be seriously crippled in areas that turn off magic items or in scenarios where I don't have access to my gear.
