Chuck Palahniuk, best known perhaps for Fight Club, has some fantastic advice for writers seeking to ‘show’ more in their fiction.
Have a look right here where he takes aim at eliminating ‘thought’ verbs and provides examples of showing vs telling:
Don’t tell your reader: “Lisa hated Tom.”
Instead, make your case like a lawyer in court, detail by detail. Present each piece of evidence. For example:
“During role call, in the breath after the teacher said Tom’s name, in that moment before he could answer, right then, Lisa would whisper-shout: ‘Butt Wipe,” just as Tom was saying, ‘Here’.”