There is a gap that exists for every founder. It is the distance between who you currently are and the person you need to be. It is the leap required to look a potential investor in the eye and promise the impossible, or the conviction needed to convince a brilliant engineer to quit their stable job and bet their career on your vision.
Bridging that gap with willpower is inefficient. Trying to "fix" your internal psychology to match the external demands of a startup takes too long; you don't have time to resolve your imposter syndrome five minutes before a critical call.
The most effective hack is to stop asking yourself to do it. Instead, you build an alter ego to do it for you.
This isn't about inauthenticity; it is about modularity. You build a construct -- a specific avatar designed for the hostility of the market. While "You" might take a rejection personally, damaging your ego and slowing your recovery time, this avatar treats rejection as simple debugging data. They don't have your childhood insecurities or your fear of embarrassment. They are a purpose-built runtime environment that executes logic without the emotional overhead.
When you step into this role, you are essentially separating your identity from your output. You can be an introvert who, for sixty minutes, toggles a switch to become a ruthless evangelist. It costs you less energy because you aren't trying to change your core personality; you are simply acting a part until the curtain falls.
The secret to doing hard things is realizing that you don't need to be brave, charismatic, or unshakeable all the time. You only need to be that person for the duration of the task. You build the character, you let them take the hits, and when the work is done, you clock out and go back to being yourself.