But obviously you want to do it cleanly right? For example, In the past, I've eaten everything in sight for a week. I was actually 30 lbs heaver after that week. Not as part of a bulk or anything, I was just being an idiot. Course a lot of it was the weight of the food. But I could have maintained eating like that if I wanted. The excess should be in moderation and clean foods right?
Well, yes. Other's may have different suggestions and I don't know your body shape, but my general recommendation for people works like this, when I'm not getting super technical.
1. Grab a camera. Take a picture from the front. Now the side. Now your other side. Date the pictures and don't lose them.
2. Get on a solid, consistent, work out program. Grayskull LP, 5/3/1, or SS are all excellent choices. Yes, you may do conditioning. I have seen GS work with great success, but all will do you just fine.
3. Get on a consistent diet. You do this by planning out your meals, counting your calories per meal, and your protein per meal. A good base line to start, depending on your goals, is 2000-3000 calories and getting 30% of that from protein. That's 600-900, approx, calories from protein which is around 150-225 grams of protein per day.
(Side note, if you're younger you can eat a lot more. Some people recommend eating 5k calories, but honestly for most people that's just too much to start off on and telling somebody to drink a gallon of whole milk can get risky if people are really concerned about how their body looks.)
4. Try to keep your carbs and fats healthy in each meal.
5. Do this for a month.
6. Take pictures again. You should have some changes.
Now, here's the fun part. Look at the before and after and find out what you want to do. Need more weight? Kick up the calories. Need less, drop them down. Don't cut out all your fats and carbs, but make sure you're getting your protein in. The scale deceives, the pictures do not.
Honestly, bulking and cutting can have some similar diets with just a different quantity and maybe more dirty food on the bulk end. If you don't care how you look, you can grab everything in site. I find most people are happier when they see their results not just in the weight room but in the mirror.