Q:

How do I move an AWS application instance from us-east-1d to us-east-1b? 

I have an instance that I accidentally setup on us-east-1d without realizing it.  I have another application that is supposed to connect to it but times out.  I contacted AWS support and they told me the reason why is because the connection isn't going through the load balancer which only works for us-east-1a and us-east-1b instances.  Is there an easy way to move my instance from us-east-1d to either us-east-1a or us-east-1b? 
Thank you. 

A:

AWS Documentation is generally excellent and covers many common situations.  In your case it's covered here. 

To move an EC2 instance, create a new Amazon Machine Image (AMI) in
  the desired target Availability Zone, launch a new instance based on
  this image, and then reassign the Elastic IP address from the instance
  you are moving to the new image. 

The linked article contains detailed step by step instructions.  I see no value copying them into this answer, though SF usually prefers that, as AWS documentation is kept up to date.