1. Take Baby Steps : Cutting out everything you love is an extremely BAD idea. You will get burned out quick. Take your time to research and know your stuff. Begin by reading about about whole living to see what sparks an interest for you.
2. Moderation : I was a coffee fanatic... still am... but I was drinking over 4 caffeine drinks a day. That is enough to really make you crazy. Don't cut it all out at once. Just take it little by little. Now I am down to 2 or less. Fast food is okay every now and then, but get out of the habit of running through the drive-thru every week.
3. Realize your weaknesses: I know that if I have a cake in the house or anything rich and sweet, I will eat a whole lot of it. Sweets are my weakness so I limit what I keep in my pantry. If you know you will over indulge in something, keep it away.
4. Making the switch : Use wheat rather than white bread and noodles. Use a bit of olive oil rather than butter. Take recipes that you love and change it up. Challenge yourself to make something better for your body. It is not hard, it just takes a little thought.