unless you have superior natural genetics (in which we will all hate you for ), you wont see a tremendous difference in only 6 weeks. but you can make changes.
some very, very rough ideas. diet is key
5-6 meals a day every 3 hours. for most ppl this comes out to 1 meal before work or school, 3 meals at work or school and 2 meals after.
breakfast: oats and eggs
lunch and dinner: chicken or lean red meat or fish or turkey with sweet potatoes or yams or veggies or brown rice
mid morning and mid afternoon snacks: pop top tuna or chicken, nuts, fruits, sandwiches, jerkey
before bed: cottage cheese with natty or almond butter