Getting serious about your diet isn't a small task to undertake. It can be daunting without the right guidance and progress monitoring. That's why I like to keep a written log of what I eat. If I see results on the scale or in the mirror that I don't like, it's easy to look back and make adjustments.
As for costs on eating healthy, it's certainly isn't cheap. Especially when your caloric intake starts getting bumped up. I budget $125 a week for my grocery bill, and that doesn't include money spent on protein powders, vitamins or supplements. I'm a bit of a freak though with my daily diet sometimes peaking over 5,000 calories when I'm doing something highly active all day.