A small thing to some, but a significant one for me: I've managed to do the update on our accounting software.
Sounds insignificant? Well, two years ago (during my first year here), it took eight months, a lot of headscratching by our local IT Dept and the software providers, and the eventual use of an intermediate upgrade to effect, causing massive disruption to the bookkeeping, and a lot of work for me which is still having repercussions.