Hi there Flaco, (not quite flaco actually!!

My personal experience has been that you should just proceed with life as normal and not worry about doing positive things. I have not seen any decrease in my enjoyment of exercise, sex, food, whatnot, either on nal or the next day. Many people on the board have had the same experience as me.
As for the dosage...I think 50mg is the only dose that has been thoroughly tested. Start with that and give it several weeks. If you really feel like it is not enough then you can try 75mg. I think you only start being in dangerous territory around 300mg, so no worries about overdosing. IT's just that you might get more side effects without getting more benefits.
good luck and keep us posted!