You can keep a close eye on the altcoin section here on bitcointalk so that you will be able to learn any related news ASAP, and take advantage of the good/bad news.
Good news isn't automaticaly an rise in price, as we've seen it multiple times with bitcoin, good news came and nothing happend, or we went down even more.
Same as coin halving =/= rise of value by 2x, the miners and traders decide the price.