I don’t think I have received any particularly special wisdom that hasn’t been covered above. And there are some excellent pieces of advice here.
There are three that I share if asked:
1. Avoid future surprises – if that means some more effort now, then don’t kick the can down the road. Comes from nearly 15 years working as a lawyer (but can still be handy even now).
2. Always go “to” a job, never leave “from” a job – don’t wait until you’re bitter and hate it. Life’s too short and it clouds your judgement.
3. Change doesn’t happen to other people – when organisations make changes that affect people, too often we don’t notice if it impacts others and not us and, when it impacts us, we act as if it’s a surprise. Change is a constant – be prepared to move with it.