Re: stubborn armpit "fat pockets"
Well, it is a fat pocket, so while strength training will increase your lean muscle and by extention your metabolism, what you want to aim for is fat burning. Start with light weight training at least twice a week (full body exercises), cardio at least 30 minutes three times a week, and clean up the diet. As you get leaner, those tough spots will reduce as well.
Keep your body lean, your blood clean and your mind sharp. -Rollins