If you do that, your shoulder muscles will be ready because of their engagement with heavy presses, which means they will reap the full rewards of the extra lateral raises performed. (fitnessandpower.com)
Start by doing heavy pressing movements followed by some form of leverage raising exercises that target each head specifically. (justinkavanaghfitness.com)
This exercise works the best if you perform it after doing heavy press exercises. (fitnessandpower.com)