Teach them to write their names with mostly lower case letters.
(such as Tom).
When you plan games, take turns. Play lining up in a straight line. Practice being invisible(still and soundless).
Using the word excuse me doesn't mean some one will stop and listen right then.

Good suggestions. You must teach Kg. :D My grandson is in Kg and those are all skills he learned in PS. He still struggles with not interrupting. :D :D

I started my son at age 2 to use excuse me I could not stand to be interrupted by my kids (forgive me) If he uses it sometimes I will stop and listen other times I would make him wait. It has helped so much! My son missed the deadline for school and so I have been working on his want of writing and numbers. He has to write his numbers if he wants to watch a program or play a video game on my computer. he will sit for about 15 minutes writing 1-10 and then other numbers. It has made a huge difference!