Planning your day sets you up to begin each day with intention and a roadmap. An added benefit of proactively planning your day is allowing you to place better boundaries within your day. You are less likely to let distractions take you away from what you have already defined as most important.
One way to make time for time management is to make it a priority. Dedicate a specific time each day to working on your time management goals. This could be in the morning, before you start your day, or in the evening after you have finished your day's work.