Only 4 more weeks until my little yorkie comes home!!!

I'm so excited - and a little anxious too.
This will be my first dog ever (I've only had a cat prior to this). I grew up with dogs - but we lived in the
country so they were large breed dogs and lived outside.
My question for all you Yorkie owners out there is....
What one piece of advice can you give a newbie that you wish
someone had told you before your furbaby came home?
Thanks for any advice you can offer!!!