Although it's possible, configuring daemon by editing its PLIST file can seem obscure, and reading all the documentation can by overwhelming. To save you the trouble, LaunchControl for Mac lets you access all the documented p-list keys and apply them with relative ease. All the rules come with a clear explanation of their effect and expected values.
With LaunchControl for Mac you can use either an abstracted, more graphical interface or toggle on the expert mode, which will then let you see a more familiar PLIST editor to directly edit values for each item. The selected action will then simply add itself as a new key value pair on your PLIST. As a bonus, you now have a list of documented PLIST keys with simple and short explanations. Actions can be conditional and related to folders or file changes, StdIn / SdtOut, time intervals, and many more. The list contains more than 30 actions to choose from and can be combined to achieve the expected results on a particular daemon. We particularly appreciated the warnings to let the user know when they are attempting to modify system-critical elements. The price for this software is $10, but since there is no copy protection you will not receive a serial number or license.
If you are looking for more power-user customization of your launch items and daemons, but are not too fond of reading manual pages on the terminal, then LaunchControl for Mac might be the solution to fill the gap and let you more easily customize daemon behavior.