Stopping OSX services from starting at bootup

Example of stopping mongo and postgres from starting on OSX bootup.

# Stop from currently running. Do the same for postgres.
launchctl unload -w ~/Library/LaunchAgents/org.mongodb.mongod.plist

# Don't run on startup. Do the same for mongo.
vim ~/Library/LaunchAgents/org.postgresql.postgres.plist 
# After RunAtLoad node there is a <true/> <false/> node. Set to false