When it comes to mass gaining workouts it is important that a variety of principles are in place.
Once you identify these principles creating different workouts isn't that difficult.
But first we must identify a few of these principles.
Here they are in a nutshell:

• Lift Heavy
• Use Basic Exercises
• Avoid Machines
• Don't Over Train

It is also really important to shock your body and to keep changing your workouts when they stop working for you.
Below are 3 different mass gaining workouts ranging from beginner to advanced.
Beginner Routine Here is an effective program that is great for beginners.
It consists of 3 full body workouts each week.
In the beginning you only need to familiarize yourself with the exercises.
You can then go heavier as you progress along.
Monday, Wednesday and Friday

• Squats
• Bench Press
• Pull-Ups
• Shoulder Press
• Bicep Curl
• Skull Crushers
• Calf Raises

You can do 3 sets of each exercises while varying the amount of reps that you do.
Once you have been doing this for at least 6 months you might want to move on to a more intermediate workout.
Intermediate Routine Once you get to the intermediate level you can start focusing more on specializing each body part.
This will really give you better results with your mass gaining workouts.
With this routine you can divide your body up into 3 different workouts per week.
Monday

• Bench Press
• Dips
• Military Press
• Close Grip Bench Press

Wednesday

• Bent Over Rows
• Pull Ups
• Bicep Curls
• Wrist Curls
• Crunches

Friday

• Squats
• Leg Extensions
• Stiff Legged Dead Lifts
• Calf Raises

This routine should give you really great results and will help you to keep progressing.
It allows each body part plenty of time for rest because you are only exercising them once per week.
Advanced Routine Once you get to the advanced stage you can break up your workouts further so you can concentrate on each muscle group even more.
This routine will give you amazing results because you are not over training.
Monday

• Bench Press
• Incline Bench Press
• Dips

Tuesday

• Bent Over Rows
• Pull Ups
• Dead Lifts

Wednesday

• Skull Crushers
• Close Grip Benches
• Crunches

Thursday

• Barbell Curls
• Wrist Curls
• Reverse Wrist Curls
• Calf Raises

Friday

• Squats
• Leg Extensions
• Stiff Legged Dead Lifts

As you can see, the possibilities for your mass gaining workouts are virtually endless.
You can keep using a program as long as it is working for you.
If it isn't broken, why fix it? Only make sure that you keep progressing and improving on each lift each week because that is what will make you muscles grow larger and stronger.
If you fail to progress you will stay the same so you must make a conscious effort to push yourself.
Once you learn how your own body works you can start experimenting and creating your own mass gaining workouts based upon your particular needs.
You only need to make sure that you keep the main principles in mind.
Once you do that and you are consistent the sky is the limit.
Contrary to popular belief you can reach your genetic potential rather quickly.