The guillotine press – where you bring the bar down to your neck instead of the lower pecs – is a great chest developer. But there is risk. Keep these light and under control. This is not a bench press variation to go heavy on. And don't try to set a PR! This is bodybuilding, not powerlifting.
My favorite way to use it is 6 x 6 with 20 second rest periods between sets.
Certain things look good on paper, but most don't pan out. For instance, Eric Cressey thinks wave loading is a bunch of hooey, as are weight gain powders and, believe it or not, the notion that external rotation movements are a cure all.
Jim Wendler lists the best in conditioning, getting stronger, assistance work, home gyms, and strength training books, along with torpedoing the “best” myths.