Maintain a daily log of how did you utilize your day. You can also write down list of things you want to achieve today. To make proper use of your day do invest 5 min at the start of the day to write down Just 1 major thing you want to achieve today. This will keep you focus for throughout the day and will give you a goal to pursuit.
5 minutes at the end of the day to review your day. To check what did you accomplished today and did you try and achieve the goal you had targeted today.