Lot of people will tell you do this or do that, eat this or eat that... but no ones motivated all the time..so even though those advices sounds good right now, in about a month when you are more likely to feel less motivated, they are gonna fly right out the window.
Here's what you need to do:
1) Plan simple
 be it working out or eating right, make it simple.Choose few good exercises, and few good types of food that you can memorize in your head.These workouts and foods should be easily accessible, and not at all complicated to prepare. You should however be prepared to eat same kind of  food more than few times a week, or at least until you get that habit sunk in your head.

2) Be consistent:
This wisdom is all you need. But the thing is its easier said than done. So keeping it simple helps you become consistent. You need to follow your simple plan regularly for at least 3 months.

Exercise is great overall, but if you want toned body, a good diet is much more important . If only I had a penny each time I saw some  Nepali dude with big biceps and a big belly walking down in New York!!

You can  go 2 ways right now:
1)Start out by eating a little less than what you are eating right now but the same food , and drink extra glass of water to fill up that space.
2) you control your breakfast and dinner by eating it at home or carrying with you to work.
These have to be healthy . Low fat, high protein, and some carb. However, you can eat whatever you want  for lunch, and maybe even sneak in some ice cream.

Again, keep it simple.