The "secret" is to validate as much as you can, without writing the actual code. It's not a guarantee in any shape, but will save you lots of money. Try to get some people on the waitlist as soon as possible. If it doesn't work, it will be every bit as hard to get them to buy/use your product. Pivoting is fine, but always launch and get the feedback as is, instead of delaying. It will allow you to pivot faster. Working on 3 features? Choose one and launch, get the feedback and add the others in the next release. Remember: "Shipped is better than perfect"
The "secret" is to validate as much as you can, without writing the actual code. It's not a guarantee in any shape, but will save you lots of money. Try to get some people on the waitlist as soon as possible. If it doesn't work, it will be every bit as hard to get them to buy/use your product. Pivoting is fine, but always launch and get the feedback as is, instead of delaying. It will allow you to pivot faster. Working on 3 features? Choose one and launch, get the feedback and add the others in the next release. Remember: "Shipped is better than perfect"