Every Catholic is called to strengthen their spiritual life during the season of Lent. We should all make reasonable but challenging resolutions in three areas of our lives; our prayer life, self-denial, and charitable works. Pick something for each of these three that you can reasonably do for the entire period of Lent, but something that will have good level of challenge or difficulty. Keep in mind that your penances, or resolutions, should not be a burden to others.
Some suggestion examples: