How does this diet/exercise plan sound?

I’m looking to lose a few more pounds (slowly is fine, no rush) and get healthy and stay that way. I’m not overweight now, but I’m not happy with my body. I want to find a plan I can stick with for the long haul, because that’s what I have an issue with. I just wanted a little bit of input on a new plan I came up with.

For breakfast, I will eat 1 cup of strawberry greek yogurt with ½ cup of low fat granola with some fruit. For lunch, I will eat a handful of a nut blend I like (cashews, pistachios, almosts, peanuts) with some cheddar cheese and more fruit. Dinner is my least healthy meal because I eat whatever I cook for my fiance (spaghetti, sirloin, chili, ranch burgers, etc), but in a smaller portion with a veggie (broccoli, cauliflower, green beans, corn, etc) on the side.

First question, what can I snack on? Sometimes while I’m cooking or in the afternoons at work I get hungry and end up eating something unhealthy that we have at work, like chips or sweets. I don’t want to overload on carbs, but I can’t exactly bring a bowl of fruit to my station while I have customers in front of me. So what are some healthy snacks?

As for exercise, I will be alternating walking at 3.4mph for 30 minutes and fat blasting Tae Bo for 30 minutes so that I’m working out five days a week. On weekends I will try to keep active, but my weeks are so stressful that I let myself relax and even indulge a little bit when I’m not working.

I know that a lot of people say that eating the same thing each day is a bad idea, but it works for me. If I get sick of it, I switch it up. But it’s a lot easier buying stuff for the same lunch than a different lunch every day because I end up wasting food.

Oh, and I also drink PLENTY of water.

So, how does my plan sound? Any thoughts or suggestions?