Congratulations on the new job

Diary management has to be my most hated task. My boss likes to add things etc to his own and often doesn't tell me he's added things and expect me to pick up and reports etc. I often don't because he doesn't include enough info ... i.e. there will be an all day appt just with the title London Visit! argh!
Outlook has the facilility to display two calenders side by side which I find really useful and I've developed the habit of printing off a paper copy on a Friday so I can check for amendments that boss may have made over the weekend.
I use my calender for reminders for reports for relevant meetings, booking buffets, refreshments etc. as I rarely have any appointments for myself, and 9/10 they link to bossies diary.
I rarely add anything to his diary without running it past him, and he rarely cancels or rearranges appointments with external people, our internal contacts all accept that diaries need to change so reorganising isn't usually a problem. Another PA in my office sits down with her boss every Fri afternoon or Monday morning to got through his paper diary and pull out anything that needs adding or changing.
Best thing to do is ask how they want to operate. They may have their own ideas and if they have had PAs previously may already have some good techniques in place.
Good luck
Callie