I think you remember, I have talked about scaling your meteor app with Meteor Cluster in this protip. In that protip, I just skipped from talking about load balancing. So I decided to discuss on that here.
Normally we access our meteor app using a single IP or a domain name (endpoint). Now we have several nodes(endpoints) running our app. So how do we share/distribute connections(from browsers) with these endpoints? This process is called load balancing, and you can learn how to load balance your meteor app with my newest article on MeteorHacks
Read my full article: Load Balancing Your Meteor App