heroku how-to

to deploy master branch to heroku (default for most weeks)

git checkout master to swtich to your master branch (if you're not already there)
heroku create
git push heroku master push local master branch to heroku's master branch
debug any errors you get from the git push command

to deploy a non-master branch to heroku

Same as [deploy master branch to heroku] except the last command is:

(given your branch name is "my_feature")

git checkout my_feature
git push heroku my_feature:master (heroku will only run the master branch of its own repo, so you must specify master as the target branch for the push