My only addition to the golf bag was a Taylormade Spider putter and my putting has really improved. Not sure if it just a mental thing, but the longer line really helps me to aim better and it feels like I am more confident with putts under the 7 foot range.
I also discovered a new brand www.luckygolf.co and must say that I was really impressed with their towels and gloves, and I think they are reasonably priced as well.
Next item to buy is a new golf bag so let me know which one you recommend!