/etc/systemd/system/your-new.service:
[Unit]
Description=Your cool new service
[Service]
WorkingDirectory=/where/your/service/lives
ExecStart=/where/your/service/lives/bin/daemon
[Install]
WantedBy=multi-user.target
[Unit]
Description=Your cool new service
[Service]
WorkingDirectory=/where/your/service/lives
ExecStart=/where/your/service/lives/bin/daemon
[Install]
WantedBy=multi-user.target