After recovering from a heartattack, I would have to do some math.
To be succesful, but most of all helpful, for a longer period of time you have to stay and behave like a dolphin as well. With power comes responsibility.
So after calculating what I need to do to keep the power to help others I would:
I am a strong believer of emphasizing the positive, therefor I would
@steembasicincome, 
@dustsweeper to name a few. Delegate some power to them so they can do more good.It is not good to give the bad any energy or attention but certain developments on the Steemit platform just have to be counterattacked. I would support people who do that already. I think it is better to support the ones already taking care of it, than to start new projects with the same goals.
Host a different contest every week with a substantial prize reward. Something everyone can participate in and has a fair chance to win.
Put someone in the spotlight. Being a dolphin would lead to more followers, no doubt. It would be great to use that opportunity to give the floor to people who are working really hard to get their account to a good level. For many people there is a moment when they are ready to quit, just because no matter their hard work, they never seem to do as good as others. These people deserve to have their 15 seconds of fame on the Steemit platform. These people need to hear they are doing great and that others are not always playing by the rules.
I'd also create a new account. A mystery account if you wish to call it that :)
With that account I'd like to reward people without them knowing who it came from. Like Santa Claus.
I will still be me, so I will continue posting the way I do now. Sharing some stories, but mostly pictures and photoshop creations. These will not change the world, but they make me happy and that should count for something too.
Thanks for hosting this contest 
