what should i do and how long and how often should I do them for

As of now I only have one 15 pound dumbbell, what exercises or techniques can I use to get the most out of it? If there are any other good ways to strengthen arms or biceps without the use of equipment, that would be appreciated as well.

I already do bicep curls, lifting weights from my shoulders upward, and extending the dumbbell behind me to tighten under my upper arms. Looking for some additional arm exercises to expand my routine.

im a wrestler and i need to gain more muscle outside of lifting. what are some dumbbell workouts? (btw i only have ONE dumbell)

i'd like to work out my shoulders, back, and chest, but only have 1 dumbbell. What are some good exercises.

I know plenty of leg dumbbell exercises but I would like to learn some upper body workouts for a person that is a little skinny.

I know lots of legs, shoulders, arms, and chest dumbbell workouts but not too many for the ones that give you a six pack!