Inspect your Schedules
The best way to learn coding is to turn debug on and simply inspect your output. If you want to dig deeper, then you often need a custom tool that allows you to inspect the result fast and nicely, readable formatted.
I wrote a plugin for some other answer, that helps you inspecting the WP “Cron Jobs”/Schedules. You can grab it on GitHub as Gist.
Here’s what the output looks like.
Forks
@StephenHarris forked the plugin, which is also available as Gist.
Primary difference between this plug-in and the original, is that this displays each seperate cron-job even when two or more share the same hook (and arguments).
– Stephen Harris in the plugins comment