To be in ministry for the long haul, I’m learning that it requires some support, vulnerability, and deep devotion to Jesus for sustaining faithfulness.  Rich Nathan (pastor of 30+ years) lists some great practices.  Check out the source page for more details on each practice.

Source:  

#1 Build a rock-solid daily personal devotional life with God.
#2 Choose a prayer partner, who is a peer and with whom you can be utterly transparent
#3 If you are married, schedule a weekly date night with your spouse.
#4 Get financial counseling from a professional financial counselor.
#5 Ruthlessly avoid all compromising situations with the opposite sex.
#6 Take care of yourself physically.
#7 Do not confuse knowledge or skills or giftedness for spiritual maturity.
#8 If you are married, take a great marriage inventory with your spouse and have a professional marriage counselor discuss the results with you.
#9 Join a small group (and if married, join with your spouse).
#10 Cultivate the fear of the Lord and a fear of sin.