Workout Routines

I’ve been working out for about a year and a half. I did grow a bit but I hit a plateau. I’ve increased the weight I lift and I try to do different types of workouts according to magazines but they don’t say how long to keep doing the excercises.
I’m currently doing a chest workout, [...]

I am going to try boxing and i wanted to know what kind of workout routines i should do. I have a barbell, and a couple dumbbells. I also have a local gym close by.

With workout routines say on monday its chest/triceps. I dont see how this would last a hour? After doing say your 3 exercises for your chest then triceps it wouldnt last very long? How do you do a hours workout?