During this week, practice mindful breathing. This exercise as any other it is better done in the mornings, after you wake up. This has two advantages:
It helps you to set the mood of the day (more positive, starting your day with a self-care practice).
It will be easier for you to do avoid skipping your daily practice, since it can get lost due to your busy schedule.
Ps: You can do this practice for 6 days and rest one, or from Monday to Friday and rest the weekend. Resting does not mean not to practice mindfulness but to use those day to explore other ways to be mindful in a more creative way.