You could say all day with a poster like me.

But for example do you set your own sort of times. For example you might start at 9am but by the time you arrive get a coffee mess about you can't really get going until 10am.

I go for lunch at 1. But at 12 I seem to stop. and 4pm - 4.30pm I stop completely.]

Also what are your time wasting techniques. For example if you want to kill 30 mins maybe you go for a stroll and speak to other folks in different departments.