What is your system to find new products (for PL)?

Hi, I am currently searching for new products/niches to sell as privat label. So far I am doing well with browsing my favorite online shops for new ideas and validating the demand with H10.

However, this is a very random unorganized process. I was wondering if you guys have any methods/systems that you use to find new promising products for your portfolio? What are your indicators to go for a product?