You can also cure egg yolks in a mix of salt and sugar. They become firm enough that you can grate them over dishes as a garnish!
u/HeckityHeckity have you seen Michael Ruhlman's book on eggs? It has a chart that sorts all the different ways of cooking eggs (e.g. hard in shell, hard with no shell, whole, separated, etc). It comes with a pullout poster of the chart! Plus it has amazing recipes--and all the chapter headings follow the chart. If eggs are a SI, I think this book will make your heart happy!