I wish I had more things to fix! it was so satisfying!
The battery of my trusty old 5th Gen iPod was no longer able to hold a charge. If I had the cash I might have bought a new one. But fixing it myself ended up being much more fulfilling.
I was nervous, but I trusted the instructions and all went well.
The battery was difficult to remove (glued in place by apple). I was afraid I might damage something but I just kept prying at it and it came loose.