I try to stop eating everyday by 6pm...I may start with breakfast as early as 5am depending on the day. I've been considering going to a 9-6 or 10-6 window, but that would be driven by when my training rides take place...typically commencing at 10 or 11am. That said, before long rides/events, I tend to eat more and eat whatever it is outside the time window to ensure I have enough calories for a good start and some sustain. I drink mostly water, some coffee...no alcohol.