Please share how you do researches and find the next coins to buy. As for me, I just read this forum and coinmarketcap and a few more website depending on which coins are in my list.
It's hard, I first investigate the teams behind coins. If they have a solid team and big community, that would be a good option. Second I check whether the coin creates any innovative.
As with your practice, the team is very important to the maintenance of the coins, the team will be based on the original coin to add some features, so that the coin may be appreciated. The most important thing, we should hold it for a long time.