If you want some techniques which will help you then you can get all the techniques you want at Substitute Teachers United (STU). It's a new online message board for substitute teachers. It's the FIRST and ONLY message board dedicated to subs and subbing and it's really active too! (Nearly 300 members, 1,000+ threads, and 16,000+ posts) You can join by going to http://www.substituteteachersunited.net/forum
There's even an area of the forum for new subs: http://www.substituteteachersunited.net/forum/forumdisplay.php?f=19
We also have a good section for CLASSROOM MANAGEMENT: http://www.substituteteachersunited.net/forum/forumdisplay.php?f=15
Please feel to give advice and get as much feedback as you need. Our resource area is also at your disposal: http://www.substituteteachersunited.net/forum/forumdisplay.php?f=13