The truth is, inspiration doesn't always strike! But something does! Perhaps we've had a difficult day, or woken up with a sleep injury and nothing seems to be going "right." The creative choice–the difference between people who feel creative and people who don't is choosing to take whatever comes (bad day, etc.) and using it versus letting it use you. Inspiration may not strike, but creation will!
"Boldness has genius, magic in it." -Goethe