How to get Android command line tools to work?

I cannot figure out how to get my Android command line tools to work. I had run the following commands, but when I type in Android avd, the output is bash: android: command not found. Does anyone have any advice on how to get the Android command line tools to work? I have installed the SDK, etc. I am not sure what to do.

export Android_Home=/Users/username/Downloads/adt-bundle-mac-x86_64-20131030/sdk/tools
export PATH=$PATH:$ANDROID_HOME/tools