Guidelines for Ice Breakers

Be organised. ...
Don't use ice breakers that will make your participants be uncomfortable, embarrassed or look silly.
Don't pressurize people to take part - this would not be a good start.
Allow plenty of time - they always take more time than you think.

25 Icebreaker Activities for Any Group

1
Two Truths and a Lie. Participants list three things about themselves, two are true, and one is a lie. ...
2
The Envelope Please! Group members list 10 facts about themselves on strips of paper and then put them in an envelope. ...
3
People BINGO. ...
4
The TP Game. ...
5
10 Things in Common.