During Lent it's very common to undertake a fast. Here's an interesting suggestion from the devotional I've been using, Good Enough by Kate Bowler and Jessica Richie.

Do you want to fast this Lent? asked Pope Francis.

Fast from hurting words and say kind words.

Fast from sadness and be filled with gratitude.

Fast from anger and be filled with patience.

Fast from pessimism and be filled with hope.

Fast from worries and trust God.

Fast from complaints and contemplate simplicity.

Fast from pressures and be prayerful.

Fast from selfishness and be compassionate to others.

Fast from grudges and be reconciled.

Fast from words and be silent so you can listen.

For more about fasting see these posts:

Martin Luther on Fasting

Taking A Break

Lenten Discipline