The day of the meet you need to have a cooler and include the following:
-Gatorade
-Pedialyte
-Fig Newtons
-Water
-Granola Bars
-Bananas
*Things of that nature, high in natural sugars and provide a good source of energy.
That morning you need to wake up and eat a good breakfast. Something that will provide energy to get your day started and sustain that energy throughout the day. I like to eat at cracker barrel, eggs, bacon and pancakes
You're training way too many reps here, there is no need to hit a set of 10-12 reps! Never even go as high as 8 reps this close to the meet! This competition is for power, not reps, so you need to train for power. This can be compared to training for a sprint, sprinters don't run 2 miles when they are training for a 200 meter race. Sprinters train for a short, intense burst of energy, similar to a 1 rep power competition.
You need to be focused on 1 intense, centralized, burst of energy. For you, it's driving your heals into the platform and ripping the bar off the ground. There is a lot more than that involved but it's more a figure of speech.
Since you're this close to the meet I would set up your routine like this:
6 weeks out
2 reps at 70%
2 reps at 70%
2 reps at 70%
5 weeks out
2 reps at 72%
2 reps at 79%
1 rep at 84%
4 weeks out
2 reps at 70%
2 reps at 70%
2 reps at 70%
3 weeks out
1 rep at 80%
1 rep at 82%
1 rep at 86%
2 weeks out
PULL ONLY YOUR OPENER ONCE!!!! Then go home and rest.
1 week out
I never pull the week before the meet, let you body heal and trust me, you will pull like no other the day of the meet!
^^^Of course work up to that weight, don't just jump to it. But along the way, don't pull any more than 3 reps, unless on the warm ups. I do something like Ex: 135x10, 225x5, 315x3, 405x2 then right to the "working sets"...
I like what Chi said about doing stiff leg with just the bar to the ground when warming up, I do this as well and it works. You want to make sure your stretched and warmed up especially before pulling heavy weight.
Make sure you have a good belt (I use inzer 2 prong 10mm) and you will most likely need the powerlifting federation card which you are competing under, and a singlet. Get you a pair of Converse Chuck Taylors too.
Let me know if you have anymore questions.