Jesus is your strength
There are going to be awesome days and shitty days. When things suck, and you're busy and overwhelmed, don't forget that your strength is in Jesus. He is the one that called you, and he is the one that will sustain you.
If you find yourself getting frustrated and caught up in the busyness, stop, take a moment and thank God for the opportunity to use your talents to help people meet Jesus. If Jesus is your focus, instead of the problems in front of you, you'll be better prepared to respond with grace instead of frustration.
"Are you tired? Worn out? Burned out on religion? Come to me. Get away with me and you'll recover your life. I'll show you how to take a real rest. Walk with me and work with me—watch how I do it. Learn the unforced rhythms of grace. I won't lay anything heavy or ill-fitting on you. Keep company with me and you'll learn to live freely and lightly." (Matthew 11:28 MSG)
Then Jesus went to work on his disciples. "Anyone who intends to come with me has to let me lead. You're not in the driver's seat; I am. Don't run from suffering; embrace it. Follow me and I'll show you how. Self-help is no help at all. Self-sacrifice is the way, my way, to finding yourself, your true self. What kind of deal is it to get everything you want but lose yourself? What could you ever trade your soul for? (Matthew 16:24 MSG)