This forum can be a recommendation for you to find new tokens, namely in the bounties (altcoin) section. You can search for new tokens there and you can do your own assessment of a token. CoinmarketCap is also a good place to find new tokens, but I don't trust YouTube, because they may deliberately promote the token and get rewarded. The technique you have to do before buying a token is to approach it from all aspects, be it how active their social media is to how big the community is, the market approach is a mandatory thing that you shouldn't miss.