HERE is a good article about the 10 nutritional commandments to follow when bulking.
Here are some good tips to remember as well:
# Increase your calories clean, keep the junk food out, look for calorie rich food with calories coming from protein not sugar.
# That being said sugar is very important post-workout, just make sure its dextrose sugar, which can be bought at a rather low cost in pure powder form and is easily added to your whey protein shake after a workout.
# Make sure you eat a good meal first thing in the morning, eggs, milk and oatmeal are all good ideas for breakfast, and it is truly the most important meal you will have during the day.
# It is a good idea to have a slow absorbing protein meal before you go to bed. This will ensure your muscles don't starve during the time you are asleep and unable to feed them. Cheeses are a good idea and whey should be avoided as it is quickly absorbed and will not be around long enough to keep you going throughout the night.
# Keep high amounts of cardio in your cutting routine as to much cardio will interfere with your weight-gaining goals by burning away all your precious calories. Don't mistake this for me saying NOT to do cardio! Cardio is important no matter if you are bulking or cutting. Just remember not to do 60 minute power sessions while trying to pack on pounds