If you're still really craving the burger and want to do small steps, you could do what my BF does...
Sometimes he "feels badly" when I'm eating a smaller dinner and he's eating a big burger and fries (It doesn't really bother me, I think he's just projecting something onto me, but that's ok!), so he'll cut the burger in half and save the other half for a snack or lunch the next day. That way he still has his burger, but it's a smaller portion. It can be a good way to "start" if you're not into changing your diet too drastically all at once - and portion control is a HUGE part of weight loss for most folks
Female, 31 years old, 5'4 1/2" tall
Starting weight 1/4/11 = 215.2 lbs.
Weight 9/19/14 = 176.6 (net: -38.6)
Last mini-goal: 180 lbs. REACHED! Reward - new sports bra
Current min-goal: 175 lbs.
Next large goal: 165 lbs. by 12/25/2014
Lowest weight: 156.7 lbs.
150.2 lbs. <--- Official "Healthy BMI" weight
Estimated final goal: 130-140 lbs.
"You don't have to change your life today. You only need to change your day today."