Tacking on, part of seeing it to fruition, and continued lifetime, is to ensure you can communicate the intent and operation to a large group of potential successors and co-workers.

An incredible epiphany that you can't transmit may not be as useful as a a moderately clever idea you can.

Yeah that's another good point. I always hope anything I make can be improved or understood by others. Now, does that happen? No. But it'd be nice