Been a fan of highlight-thing-mode. It automatically highlights all instances of symbol at point. Today, I gave highlight-symbol a try. Similar concept, but also adds the ability to jump to next/previous instances of symbol at point.
(use-package highlight-symbol :ensure t
:config
(set-face-attribute 'highlight-symbol-face nil
:background "default"
:foreground "#FA009A")
(setq highlight-symbol-idle-delay 0)
(setq highlight-symbol-on-navigation-p t)
(add-hook 'prog-mode-hook #'highlight-symbol-mode)
(add-hook 'prog-mode-hook #'highlight-symbol-nav-mode))