Usually I choose 2 strategies, 1st - I pay attention on the new tokens with small capitalization and this tokens are promising, I always relay on several XXXs , Second strategy - tokens from top 50-100 of coin market rating. I am looking for tokens with low price and buy them, in this case you can get profit by the volume, coz there are no so many chances that these coins make big increase. But nobody can provide you 100% guarantee of success