I find at my work, I have a lot to do in very little time. This is partly to my own inefficiency at my job since I haven't been there long and it is quite a steep learning curve initially. I can't guess how long it will take me as a) I haven't done these tasks enough times to be able to formulate a decent time it could take me and b) there is a time set for how long we will be at the client, I have to 98% of it done by then or else!
This is only when I'm actually on jobs, when I'm in the office on more menial tasks I find I have loads of time and waste a lot of it chatting which then means I have to hurry the work up near the end!
I also get time off for study leave (aka now) so it isn't always manic.