gistfile1.js

 User.find({}).sort('roundwins', -1).limit(3).execFind(function(err, foundusers) {
    var place = -1;
    var places = ['roundfirsts', 'roundseconds', 'roundthirds'];
    foundusers.forEach(function(user) {
      //Alright, so, sorry about this one, but:
      //Increase the document's property equal to user.'whatever place', where
      //'whatever place' is determined from the value of place increased by 1
      //as an index of the places array
      console.log(place);
      console.log(user);
      user[places[++place]]++;
      console.log(place);
      user.save(function(err) {
        //if this is the last time we have to award a player, then FLUSH THE ROUND
        if (place===foundusers.length-1) {
          User.find({}, function (err, users) {
            //Each user
            users.forEach(function(user) {
              user.roundplays  = 0;
              user.roundwins   = 0;
              user.roundlosses = 0;
              user.save(function(err) {
                if (err) { throw err; }
              });
            });
          });
        }
      });