The first thing I'd do after installing this is to alias prefixing "aws-" to every commands. I like namespacing things as I suck at remembering names...
You can just type bma[TAB][TAB] and it will list them all.
If you know the type of resource you are working with, you can use TAB completion to see it's commands:
$ stack-
stack-arn stack-exports stack-tag-apply
stack-asg-instances stack-failure stack-tag-delete
stack-asgs stack-instances stack-tags
stack-cancel-update stack-outputs stack-tags-text
stack-create stack-parameters stack-tail
stack-delete stack-recreate stack-template
stack-diff stack-resources stack-update
stack-elbs stack-status stack-validate
stack-events stack-tag