For exchanges just make sure to join their group on telegram or any social media, they will share everything there and you can expect good news from there. Or if it's a common BSC token then it would probably get listed on Pancakeswap or any similar swipe sites on the internet, but be aware of low liquidity that makes your assets worth less than the usual.

But for the "popular" matter, well other than looking at the development really closely, I would say it's a matter of luck because with so many projects are raising until today and some of them would be failed so we can't recommend anything besides yourself to do your own research on each projects you are following.