In the popular film Office Space, the main character (Peter) is told he has a ‘case of the Mondays’. Although Peter is by no means a good role model, I think we can all respect the fact that Mondays are different than other work days.
Monday is a day where I take some time to re-prioritize projects that need attention throughout the week. This is the best time to schedule your week. I use hour blocks to schedule time for equipment use, meetings, and even email/phone blocks. If you structure your time and stick to it, efficiency should follow. You can make Monday mornings your personal pep rallies if you are into structure and organization (key traits of an engineer).