Read and/or listen to books that give you tips on building products. Most importantly use the skills you learn about.
Don't try and do everything in the book. Try and take one or two things that resonate with you and just implement those. Obviously you need to be involved in the development of a product to do that.
For example, I listened to The Mom Test earlier this year. Instead of trying to remember and do everything from the book, I just took one part that resonated. For me that was "Don't talk about your product when interviewing customers, talk about the customer and their problem.". When you feel you've improved at that, move on to the next thing you can improve.
