Keep on moving forward no matter what happens

I'd been with my job for almost 4 years (got good reviews, team player, etc) and all of a sudden my manager called me into her office to say 'it wasn't working'.  It threw me for a loop to say the least.  She never gave any explanation other than she'd gotten a promotion and needed an assistant with 'different' skill sets.  Urghh So I got transferred to another manager as a place setter till I found a new position since I was told I was no longer a good fit for the office.  I've to adopt the philosophy 'one door closes .. another opens' since I'm a good employee.  Hard worker, team player, no job to small, independent, friendly, professional, smart and LIKES to work.  I've decided to take my hobby of social media sites and turn it into a business.  I'm in the process of setting up a site, working with a camera team and looking for a photographer for professional photos.  I haven't really allowed it to set in since I've been job hunting/creating projects since my last day.