I hate this because it's true! One can work their tail off for an hour in the gym and ruin it with just one meal. This is going to be short and sweet, because I really think the quote above says it all.
If you aren't seeing the results you want, look at what you are putting in your mouth. Is the food you eat helping you achieve your goals?
Are you eating the right things at the right time? Are you eating too much? Are you eating ENOUGH?
Anyone can workout for an hour. What's hard, is making good choices about what goes on your plate the other 23 hours of the day!
What is the last yummy thing you ate that is helping you get the results you want?