I always use twitter. Even if its a rumor on twitter it aways help in bringing the price of the coin or token until clarified by main developer. Also follow official accounts of each coin so you can get the news about the upcoming development or feature about their product as every new release help in lifting the price of coins.

Another site is http://coinmarketcal.com you can get news on that site.

If you are looking for any pump and dump group, I will advise you to stay away from them because you will always loss. If you do not understand this, ask yourself a simple question "Who is stupid enough to inform you before buying so you can buy and then they will buy from you at higher price?"