Many long-running television series have flashback episodes. They put together clips of past events. Sometimes it’s even the series finale.
Creating enough work to create your “Flashback Episode” should be the goal. Sure, you may not make TV, but to be able to put together a greatest hits of your work, or an amalgamation of past projects is an accomplishment of it’s own. It’s amazing to have enough work already prepared that you can simply edit it together and call it another piece of work entirely. Daily effort is the key here.