After being a vanilla vi then vim user for a long time before switching to neovim, I find folke's which-key plugin to be very helpful. If i begin a key shortcut combination (or press my leader key), it shows me all the keys I can press next, and again after each additional step of a multi key sequence, and what each key sequence does. it works for mappings Ive added (usually basically the defaults for a new plugin) but also the standard built-in preset keymappings (see the 'built-in' plugins for which-key) for things like window mamagement and motions, using/viewing the registers (what did I just yank?), even spelling corrections, which helps you learn and build muscle memory. Often I dont use a specific mapping for a while and this helps me find it, especially when I group mappings by plugin, and/or prefix all mappings for a particular plugin or task with an additional prefix letter, so they all appear as options when I get as far as rembering "all my debugging mappings start with my leader key, followed by d." By grouping tasks and plugins that way, I can press my leader key and see a list of where to go next, almost like browsing a menu hirearchy. "i dont remember which button to press after leader and d to toggle a breakpoint, but I know that's where I'll find it"