typical workflow

gistfile1.txt

Production/Staging workflow Steps
Make Heroku App for Staging 
Make Heroku App for Production

Add remote for production

heroku git:remote -a <APPNAME> -r <REMOTENAME>

add remote for staging

heroku git:remote -a <APPNAME> -r <REMOTENAME>

always merge and push to staging before master

git push <REMOTENAME> <FROMBRANCH>:<TOBRANCH>

for staging app
ie: git push staging staging:master

for prod app 
ie: git push production master:master

so a typical feature would be 
1. pull master
2. branch on a feature 
   3 .push to feature branch 
4. merge to staging branch
5. push to staging app 
6. test app on staging live
7. if  all ok merge staging branch into master branch
8. if no merge conflicts etc push and deploy to production app.
9. if any changes take place deploy master to staging app to make sure no breaking changes, then deploy to production