One Hundred Pushups - Week 1 Day 1

I started out on the one-hundred pushups program. I can usually do about 43 pushups in one sitting and I want to increase my overall output up to 100 (if possible). I stumbled upon the website: www.hundredpushups.com and instantly got hooked. I don't think I will have too much problems with the program, but I think the hardest part is maintaining the hundred sets after I am finished since the program does not continue past six weeks.