I would love ideas to effectively test out my product ideas without investing too much time or funds into creating a product no one seems to want or need.
The best way to validate your product idea is to talk to your customers / users of your product. Don't pitch them your product directly, but rather try to highlight if the problem your product is solving is in fact perceived a problem by your users and what is that problem causing them currently. This will help you figure out if the problem is worth solving and if customers would be willing to pay to solve the problem. So don't start testing an idea, start with finding the problem.