It's amazing how a child can change your life and your temper!!!
Don't let the small things they do make you crazy or that's all you will be. Learn to breathe through the things they say and do that drive you nuts - after all, kids don't arrive knowing everything (they think they do) and need to learn from good examples. Patience & understanding are strong virtues that so many adults lack. Kindness and consideration are two more things that are hardly seen in society any more.
These gifts have two things in common - they are free and bountiful, if you are willing to provide them.