asyncMeteoerMethods.js

Meteor.call('method1', /* params, */ function (err, result) {
  // method1 has returned.
  if (!err) {
    // there is no error so let's call method2
    Meteor.call('method2', /* params, */ function (err, result) {
      // method 2 has returned.
      if (err) {
        // alert to the user there was an error.
        alert(err.reason);
      }
    });
  } else {
    // alert to the user there was an error.
    alert(err.reason);
  }
});