I love to use the standard log package. Hooking it up to the systemd logger has some strange side effects though. For example, using log/syslog duplicates the timestamp, host, application name, and pid.
To alleviate this, I wrote a small package based on log/syslog called sysdlog. It hooks up to the standard logger quite nicely or can be used on it's own to log messages to systemd. Feedback is always welcome!