For most software startups, this translates to keep growing. For hardware startups, it translates to don't let your ship date slip.
You should be giving out a lot of equity to your employees.
Ideas by themselves are not worth anything, only executing well is what creates value.
You cannot create a market that doesn't want to exist.
A board member of mine used to say sales fix everything in a startup, and that is really true.
So always keep momentum, it's this prime directive for managing a startup.