To the post about Depo Provera: don't do it! I've heard almost nothing but bad things about it, namely of women gaining a ton of weight and/or spending all their time puking (hell, if I wanted to gain 30 pounds and puke, I wouldn't use birth control and would just get pregnant!).
I really don't find it difficult to take a pill every day, and I'm not sure why some people do. I set the alarm on my cell phone, and when it goes off, I take the pill promptly. Simple. My mom says she always kept hers on top of her alarm clock and when she turned the alarm off in the morning, she'd take her pill.