5:45 - early rise, whichever desk you end up on you are most likely going to be waking up around this time. Adjust your sleeping habits accordingly or suffer for most of the day.
6:30 - Arrive on the desk, market opens in 90 minutes so its really a countdown from here. 20 minutes is spent just turning on all the systems, with 4 computers and basically each running 10-15 different applications this is quite time consuming. Its inevitable, but you will every morning forget to log in into one crucial system and realize at the worst absolute moment.
6:50 - Start reading various new sources, generally FT, Bloomberg, City AM, and then the internal research that comes out. Finish off with a couple broker chats.
7:15 - look at the largest positions on the book and try to come up with a rough game plan for the day. I generally like to make a list of risks I don't like, in order of priority, and then work down the list throughout the day. You want to make sure you know the biggest risks in every category (ie gamma, vega, delta, decay, skew, div).