There are two types of sacrifices: correct ones and mine
If you wait for luck to turn up, life becomes very boring.
You can't avoid mistakes and bad luck.
For pleasure you can read the games collections of Andersson and Chigorin, but for benefit you should study Tarrasch, Keres and Bronstein.
Fischer is Fischer, but a knight is a knight!
I have always thought it a matter of honour for every chess player to deserve the smile of fortune.