I've been one of those that are guilty of this.
Last two weeks, I made an effort to eat Salad after my meal on Friday and also to make an Apple Juice for myself every Saturday.
I think it requires a lot of discipline to maintain a healthy eating habit. Although I find it difficult to reduce the intake of coffee, I'm trying to do so by drinking more water. I believe it is a long process but it could also be an enjoyable one as well.
This is a bit luxurious with a lot of different fruits...when I'm working, I'll probably opt for apple, orange and maybe another fruit and that's it but I'm sure it'll still be great.