The key is your diet that is something a lot of people overlook. Make sure you are eating lots of lean protein and good fats. Also with your carbs try to get as much whole grain as possible. One more thing to consider is even if your diet is good you could have just hit a plateau and you need to switch up some of your workouts to jump start your body again.
If you want to get a buff toned muscular body then you are on the right track, as cardio weights and boxing are the best types of exercises. You can also include running and some aerobics in your routine. You should also ensure that you eat well and drink plenty of water.