There are some basics in blackjack. Splitting aces and eights only makes senses since a hand equaling 2 or 12 compared to having two hands of 11 is a no brainer. Even though you only receive one card to your ace, the chances of getting 21 or a relatively decent hand are good.
Splitting eights all the time is a bit riskier. Some blackjack studs say not to split eights if the dealer is showing a nine or a ten. For me, it depends on how the cards are flowing that day whether I will split the eights all the time or just when it feels right against that dealer nine or ten.
Probably the most important strategy for wining blackjack is to always play the dealer for a ten in the hole. This will be the basis of your winning strategy. If the dealer is showing a ten, you play him as if he has twenty and hit or stay accordingly. The same rule applies if the dealer is showing a six or any other bust combination (12, 13, 14, or 15). You always have to play as if you had x-ray vision and could see the dealers hole card.
Playing hunches will kill you. You have to have a plan and stick to it. And your plan should follow the basic rules. Granted there will plenty...