This website has been my saviour many a times! The support on here is second to none, as is the advice
You will do great on the program. As you mentioned, I think we have all been around the dieting block, but this is absolutely THE most effective diet I have ever done. I have never lost weight this steadily and consistantly before.
As I am sure you have read, the first few days are the roughest and I would suggest, if at all possible, to start tomorrow (Friday). The reason I say this is because if you are headachy or nauseous or down right crabby, you will at least be home. If not, Monday is fine, it is just a suggestion. No matter what, push through the first few days. You will be hungry and be tempted to say "forget it" but push through. Once you get to the "other side" the cravings and hunger will subside and you will be so pleased with your results, that it will definitely keep you motivated to keep going!