Usually I get news about new coin via [ANN] section. But its hard to find the best of the best ICO or coin for you to get invested.
Because there are tons / thousand and XX new coin every week.
So most of the time, I will just lurking in speculation section, reading the thread. Mostly I will just ignore any coin that people suggested with "buy my XXX coin".
Instead of "buy my xxx coin because it have XXX supply, not ERC20, good team, new technology, powerful road-map".
And this is how I'm invested.
You can also use reddit or by joining facebook group to get new idea and news regarding upcoming coin.
But still, most of the coin that exits, are born through bitcointalk [ANN] section.