On the right track?

Hello everyone. I'm not exactly new to myfitnesspal, but I've never been to the website before now. I've been poking through some forums and reading a little here and there, and it's encouraged me to post a topic of my own, that being, am I on the right track with my routine? Let me go into some detail...

It started back in January, I was 200lbs. 5' 5", 22 years old. Due to a change in my life, my eating habits began to change.
- I drink nothing but water. Period.
- I cut fast food out of my diet completely.
- I refuse to eat past 7pm (bedtime is 10pm!)
- I snack throughout the day.

Then I found myfitnesspal and even more changes were made.
- I drink 74oz of water daily.
- I (try) to consume between 1200 and 1500 calories a day, it's been difficult lately.
- I drink unsweetened oolong tea, 24oz a day.
- I take iron and B12 supplements.

Now I weigh 170lbs just from dieting alone. But progress has slowed, and I know that I'm going to have to incorporate exercise into my routine as well. I plan on walking 2 miles in the morning, and 2 more in the evening.

Let me explain what I eat daily, and this is where is gets difficult...

Breakfast- 540 calories
Special K Protein Bar
Honey bunches of oats cereal
Slim Fast

Snacks- (3 times a day) 445 Calories
Baby carrots
Almonds
Yogurt

Dinner- varies
For dinner I try and just use the rest of my calorie room, but to be honest, it's usually 3 or 4 eggs, veggie stew, or soup. Anything high in protein.

So, just by this information alone, if I stick with my calorie intake goal and exercise goal, does it seem okay? Are the foods I'm eating healthy? I suppose I just want an outside opinion.

Thank you.