Carry out anger counseling with several activities. One of them is use of a book. A book suggested in "Counseling Activities for Teaching Anger Management and Social Skills" by Felicia Clark and Nancy Dyer is "The Very Angry Day That Amy Didn't Have" by Lawrence E. Shapiro and Charles Rena. The idea is to use a book that shows situations that would frustrate a child and then discuss how she can deal with them instead of getting angry.
Discuss what makes a child angry and how to deal with it. This activity builds on the work done with the book and allows children to think about things in their lives that anger them. Then together you can talk about why they get so angry and what they can do to prevent this and feel better about themselves.
It can be hard for some children to make friends and this can be dealt with through counseling activities. One way for you to do this with kindergarten students is to play with dolls and reenact how he acts and how other people act. You can then look at the positive and negative things that happened and talk about this to show him what was good and bad in a situation and what can be done to improve on making friends.
Manners go with social skills; a student has to be able to properly deal with an adult and authority figure as well as with his peers. Role play is a great way to work on this social aspect. If you are working with a group of children, assign different positions to each one. They should all have a chance to be an authority figure and a student. This will provide an opportunity to explore their notions about authority figures as well as how they deal with them.