New investor who will be landlording a duplex

[Carol Kohn]

I am closing in a few days on a duplex that is fully occupied. A few newbie questions about inheriting the tenants:

1. Should I have them fill out a new tenant checklist? (move in checklist) Or rely on the original move in checklist? Only one of the tenants filled out a move in checklist.

2. I will be changing the locks, and using a handyman to fix some minor items from the inspection. Is there anything else that I should do? Ie: should I have plumber replace valves, pluming hoses, etc; 

3. I have read that I should send a letter to the new tenants with an introduction and new payment procedures. How quickly after I sign the closing docs should I do this?

I have read and researched quite a bit on being a new landlord, but would love any additional tips/recommendations for a newbie. Thanks in advance!