I want to work very hard to earn my Made Man promotion, so I'm tring to gain prowess. Yesterday, it was at 56%, but today, its only at 40%! Is there any special thing to do, other than log on and do crimes, sell drugs, and bust people out of jail? Please let me know. Thanks!

You have to keep working hard. Your prowess how hard you are working compared to others your rank. So if it went down, then others are working harder

Okay. Thanks. Any specific things I need to do to work harder, or just be more active?

Prowess shows your input to the game in regards to other people of your same rank, so put more time in and more crimes jailbreaks etc will raise your %.

A player who is on 3-4 hours a day criming and jailing, posting and mailing will have a higher prowess than someone who logs on and clicks a few times then logs out,

I hope this hasn't confused you too much but basically just play more :D

Thank you for that information. I will work harder. :)