asynccombination.js

var async = require('async');

async.forEach(someData,function(singleData,callback){
  async.series();
  //OR
  async.paralle();
  //OR
  async.waterfall();
},function(err,data) {
  // final callback
});

// going more deep.

async.forEach(someData,function(singleData,callback){
  async.waterfall([
      function(callback) {
        async.forEachLimit(somedata,100,function(singleData,callback){
          // You can use more combo here too.
          callback(null);
        },function(err) {
          // final callback
          // Now call the callback of waterfall.
          callback(null,"No error");
        });
      }
    ],function(err,data) {
      // callback of top async.forEach()
      callback(null);
  });
},function(err) {
  // final callback
});