parenting ashwin

yesterday morning i took a deep breath and said I'd breathe life and kindness ro my children, and i turned ashwin's day around by joking with him and all. 

but by 5pm I lost it and yelled at him so much.  and again at 8pm. I feel awful.  I need my spirit giving spirit to last the whole day especially when he acts up. how do I calm him down in a middle of a melt down. and teach him things well. he's getting to that stage where he doesn't want to do things for others gets very impatient if things don't go exactly his way and all. I get worried seeing that but yelling at him may not help. please help me God.