How can we do market research & survey effectively for a startup?



I’ve been trying to figure out this for a long time. There are two different questions here which I feel somehow most important when you are on ideation stage of your startup. One is effective market research and another is the predictable survey.

Every time I come across a new idea or a thought, I immediately search similar ideas with related keywords on Google, however, most of the time I end up finding two or three things similar to what I’ve been thinking out. Are there any specific tools or websites on which we can completely depend on for a market research?

Another question is that how can we do an online effective survey and can we completely depend upon the survey results? What are the other ways to get our ideas validated or we can be sure that what we are planning to implement is a real need?