What is said by BetFury was correct and every single aspect should be taken in consideration while gambling.
First, many people just jump in the first game they see or feel they know it without reading the rules in most cases. Just how to play it especially if there was a similar version to it in another place. By analysing, we can include also the way we play, our tendance and expected movement that make us losing.
Second, emotions are an important part of the failure of most people. You won the first move, you want to increase your earnings fast, you lose then you want to get your money back as fast as possible. Without recognising it, these emotions make you take the wrong decision and make your next moves quite expected and silly.
Third point, simple goals = less risk and money to lose.
Careless people will make more mistakes than careful people and it's true with gambling too. Free spins from casinos are very good opportunities for careful gamblers to take advantage of free spins in order to explore games and get familiar with those games as well as consider whether they can play those games well enough.
It can reduce risk of playing games that are hard to win and it is helpful for careful gamblers to gamble more responsibly. If they see any game that is too difficult to play and win, they will ignore that game and find other games to play. To do all those things carefully, checking guides and rules of any game is very important for gamblers.