Explore the help topics, and if you can't find your answer or just want to say 'hi', please come by the forums (which are filled with friendly folk, we promise!) or email us.
We're always happy to help by Twitter, Facebook, and Google+ too.
Yes! You're not limited to those suggested when you type *. You can use any of the supported time estimate formats, e.g.:
Study for exam =3.5hrs
Still need help? Contact a human