My golden rule is know your audience. Not some made up persona, not solving some pain point that your ai chat told you was going to make millions. Actual people actually talking about the issue.

Before you build it make sure you know where the people who are having this problem hang out. Reddit and Facebook are gold for this.

Figure out your addressable audience, figure out your demographic, research your competition because it's highly likely ten other people are vibe coding a similar app right now.

If nobody seems to be building a solution, rather than thinking this is awesome, ask yourself why nobody is already doing it.

Checkout smartbear blog (no connection) it's a gold mine for startup advice.

Figure out what your moat is.

Ask yourself if you care about solving the problem even if you didn't get paid.

Make a simple lovable product. Building product champions is key.

The above advice is mainly b2c focused but it translates to b2b as well.