I know the hardest part of a Monday can be something as simple as getting out of bed in the morning, but it doesn't have to be. 

Its been pointed out that there are two elements needed to succeed in business, though it can apply to the mental mindset too. 

The first is a good strategy – making sure you’re heading in the right direction and focusing on the most valuable opportunities.

The second is how well you do your work. You must perform with speed, positivity, efficiency and drive to achieve great things.

You need to get your mind right. You need to maintain a high level of personal motivation to win.

This article provides great insight into the idea of motivation, how one can achieve it and what can be done with it.