Need size

Can anybody give me some advice on gaining some mass because since my competition in body building I've been struggling to gain weight!

Stick to compound exercises in the gym, work each muscle twice a week and eat a 500-700 kcal excess every day. Try to eat a 40/40/20 (protein/carbs/fat - good fats!) ratio of food and try eating every 3 hours. I split my food into 5-6 smaller meals a day. Concentrate on lifting heavy and hard, eating loads and getting at least 7 hours sleep a night. Hope this helps.