Jesus taught us to make and keep kingdom matters a priority (Luke 9:57-62).
Look at Luke 9:62: But Jesus said to him, "No one, after putting his hand to the plow and looking back, is fit for the kingdom of God."
When farmers plowed their fields to plant crops, they had a "marker" at the end of each row so they would make a straight row. Looking back would cause the farmer to lose focus and the row would end up crooked.
Consider what is distracting you today and causing you to lose focus on your God given marker for today.
Christians, in all that you plan to do today, ask God to clarify His work for you today and keep your eyes on today's "marker".
Make sure you get God's work done.
This is how to stay fit for the kingdom.