a serving of nuts is one ounce. you'll have fewer cashews in a serving because they are larger. almonds are in the middle [and most of mine say 24 almonds in an ounce]. and you'll get more peanuts in an ounce than the others. most nuts you're looking at just under 200 cals per serving. so if you are having three servings, just make sure your range is large enough to fit that and everything else you need in it. i tend to have about a serving per day on average. i tend to be running around all day and having a quick and easy snack that won't go bad is a huge plus for me. couple that with eating very little meat and nuts are perfect for me. you just have to see how they work for you.
I began eating nuts when I learned that they are belly fat blasters. However, I'm still confused on whether the caloire count vs the fat blasting is really worth it. Still not sure, when I do have nuts - chopped I only have a palm full in my oatmeal and a 1/4 palm in a salad.