Skype is one of the main ways I communicate with co-workers and I use it to touch base with my family so I need to have it running on my phone all the time. Instead of remembering to manually start the app after a reboot, I created a task to do it for me.
Profile: On Bootup
Context: Event > System > Device Boot
Task: Bootup Apps
Action: Task > Wait > 20 Seconds (allows time for system resources to load)
Action: App > Load App > Skype (or whatever app you want)
Action: App > Go Home > 0