I won't be able to spend more than 6 hours programming everyday. If it's a project that is challenging and I am really interest in it, may be I can put about 6 hours of programming. Other than that, I would spend some time researching or reading. When you are at work, even thinking your job counts as work. So a break away from the programming itself is not really a break.
If you are being timed, you probably should start revising your resume and cover letter. Well, unless you have been putting things off til the last minute.