When we are staying close to the Lord and the Word we have the tools to be disciplined. Self -discipline is a fruit of the Spirit. We are more efficient in life when we are more disciplined. God delights in giving us strength to overcome our weaknesses. We all have a weakness that’s difficult to overcome. So rather it is your diet, exercise, etc.. Turn it over to God and believe He can turn our weaknesses into strengths.
But thanks be to God! He gives us the victory through our Lord Jesus Christ.
1 Corinthians 15:57