When everything starts to look the same, then I know it is time for a change.
Over time, I've become allergic to sameness.
As sights, sounds, thoughts, or patterns start to blend together then I look for the way out. The path to next might be marked by a flash of something here or a glimpse of something there. It's often never clear what you are seeing.
When you step forward to get a better look, the doors of opportunity seem to open on there own.