In addition to calling out road items, also call out pedaling (we use "Pause" and "Resume"), "Shift", "Stand", etc. Do not stop pedalling without pre-announcing ask your stoker to do same. I would also recommend that you both use flat pedals so you are not constrained by being clipped in until you develop a rapport. Also announce when you are going to stand and take a drink. My stoker has a difficult time reaching her water bottle so I hand her my second bottle when she wants to drink.
It's all about communication and good luck, you are doing a great thing.
Last edited by Alcanbrad; 06-02-15 at 04:18 AM.