New in Laravel 5
Since Taylor Otwell and Jeffrey Way announced Laravel 4.3 (later 5) release in November 2014 everyone was eager to work with it and I know a lot of people already starting project using it since September, others even since August 2014.
But the wait is over now and Laravel 5 is finally out. What you will need the most is to watch this free introduction series to Laravel 5 from Laracasts: Laravel 5 Fundamentals and I highly suggest buy Jeffrey Way's launch once a month.
I also have some forks on github which I hope you may find useful:
Laravel 5 Activity Log - works for SaaS apps as well
Check this post if you still have doubts on upgrading from Laravel 4 to Laravel 5.