It's a feature in Reports & Analytics that you can set a specific time of day for reports to be delivered, but not in Ad Hoc Analysis. Would be a very useful addition in terms of regular exports, instead of having a daily report turn up at random and unpredictable times of the day. 

It's currently possible to search for segments that haven't been shared with others but not dashboards. It would be useful if you could also search for dashboards to check if someone had already produced one and prevent duplication of work in a large organisation.

 Time zone reports are available in site catalyst but not in Ad Hoc. Analysing usage through the day becomes impossible if you're looking at a country with multiple time zones... like the USA. California's morning blends into New York's afternoon.