One alternative is to change the trigger on publish2 (assuming that is the preview server) to be "On Modification". Then when any page or asset is changed - it is automatically replicated to the preview publisher with no additional effort by the author.
But if you use this feature - You probably also want to check "No Version" as well as "No Status Update" as well. Otherwise - you may be deceived into believing items were activated to your production publisher while they actually were not.