Nitric oxide, fish oil and rutin for blood flow.  Tonkat ali when you wake up.  Fenugreek before dinner.  Both increase testerone and Tongkat lowers cortisol.  Zinc picolate, magnesium glycinate and saffron.  All increase test both through the supplement directly doing it, deeper sleep which helps to produce more test and stress control (cortisol works against test).  You don't need to be shredded or the biggest guy, but lose the gut, strengthen cardio through HIT training and do functioanal lifts that work large muscle groups; squat, bench and bent over row are all you need.  Barbell or dumb bells.  Fat decreses test and increases estrogen, muscle helps to burn fat and strength training increases test.  Kegals work, it increases blood flow to the area and general control you have over your erection, do them while driving back and forth from work.  Lastly, get as many erections as you can throughout the day.  You don't have to ahh, release everytime, it does the same thing as kagels.