Long story short: what do you want to put into it?
It is your book, to do with as you will. Put in whatever you think you will want / need to know, that reflects your style of practicing, etc.
In a tl;dr version of all those links, and a modified version of [this post], here’s some ideas on things you can put into a grimoire (based mostly around informational purposes).
This list is not complete / extensive / ;moreso, it has a lot of different suggestions to give you some ideas of things you can put in.
about you as a witch
these could be in the format of journal pages
what you want out of witchcraft, information about your natal / birth chart if you like astrology, any notes of things you do day to day, etc.
terminology of terms within witchcraft and magic
spell timing, such as Sabbats and esbats, moon phases, days of the week, time of the day, etc.
correspondences for herbs, essential oils, crystals / minerals, colors, the four elements, planetary associations, etc.
substitutions for particular items like herbs, crystals, etc.
any safety precautions for working with certain herbs, crystals, etc.
information on how to determine personal correspondences and associations
magical / non-magical materials that can be used in spells
information on the “basics” of witchcraft
what intent means, and how to work with it
what it means to visualize, and alternatives if you can’t
what meditation can do for magic, and how to do it
what channeling energy means, and how to do it
what it means to charge / enchant objects, and methods to do it
setting up an altar / magical work space, and how to do it
information on any religions you work within
example: for Wicca, you may wish to write out the Wiccan Rede, how to cast a circle, how to call the four corners / elements / guardians of the watchtowers, how to set up an altar, etc.
information on any deities you work with / wish to work with
offering ideas for any deities you work with
invocations for any deities you work with
rituals / dedications / prayers to any deities you work with
information on any spirits you work with / wish to work with
offering ideas for any spirits you work with (i.e. the fae, elemental spirits like sylphs and salamanders, etc.)
information on the history of witchcraft
information on familiars and working with animals in magic
information on varieties of magic
examples: energy work, candle magic, crystal magic / crystal grids, sachet magic, knot magic, kitchen magic / tea magic, bath magic, traditional magic, urban / modern magic, chaos magic, pop culture magic, green magic, hedgework, spirit work, shadow work, blood magic, sex magic, necromancy / death magic, etc.
MAGIC NO LONGER LOOKS LIKE A WORD TO ME
any safety precautions for working with certain varieties of magic
any divination methods you wish to try
examples: definitions of the tarot cards, tarot spreads, cartomancy interpretations, definitions of runes, reading tea leaves (tasseomancy) / coffee grounds, tips on pendulum reading, etc.
spells that you write yourself, or sigils you create yourself
any notes and observations you made when testing that spell / using it
spells or sigils from external sources that you may want to use and/or reference
skysonglark reference 