Masayoshi Son is one of the leading investors in the world with one of the largest investment funds in the world. I once heard he knew he was going to invest in WeWork because the then CEO of this company had "dead eyes." This means CEO Adam Neuman gave great eye contact in conversation without backing down or looking away in a submissive manner.
I decided I want dead eyes so that I can give great eye contact too. This is something that is easy to practice. Whether you are in your room or on a walk you can practice staring at something for 30-60 seconds. Now, you can blink but don't look away from your target. Hold that eye contact and it will get easier and easier the more you do it!