I collected these ideas (and others) from different sources. What you see here is what I think would be interesting to put in my Grimoire (because apparently people need to be told these things).
1 ) decorations ; a personalized cover (with a picture of the moon, a pentagram, your patronus or something else, or maybe just a nice flowery design or leather cover), using a glitter pen and stickers, pressing flowers between the pages, drawing, taping photos and other visual ideas.
2 ) protection sigil on the reverse of the cover (so people won’t read it without your authorization)
3 ) your craft name and your reason for choosing it
4 ) how you define your path, can include coven rules, the tradition(s) you follow and/or a personal set of magickal rules
5 ) wheel of the year / rituals you observe as the year passes
6 ) dedication to one or several deities you worship (or alternatively, what your relationship with deities is like, whether it’s a specific deity or deities in general)
7 ) on that note, myths and information regarding gods, godesses and deities that could be useful for you
8 ) moon phases, their correspondences and what they’re good and bad for
9 ) elements and their correspondences (including the minor arcana of tarot)
10 ) recipes. not just kitchen witchcraft recipes, but also potions, beauty and cleaning products, natural remedies, powders, salts for a bath, oils, etc.
11 ) herbs/plants/flowers and their correspondences
12 ) runes and their meaning
13 ) crystals and crystal grids
14 ) spells, of course
15 ) divination (tarot spreads and cheatsheet, pendulum, scrying, astrology, etc.)
16 ) a pendulum board
17 ) dream diary
18 ) ancestors ; where they are from, specific people you wish to honour, family tree, pictures, location of graves, etc.
19 ) familiars
20 ) tools in your practice
21 ) list of charges, wards, sigils, spells, wards and enchanted items you have currently active
22 ) sigils and how to make them
23 ) spirit work
24 ) color correspondences
25 ) chakras
26 ) myths, myhtological creatures and legends
27 ) folk tales from your zone
28 ) family traditions
29 ) your views on the afterlife
30 ) binding/banishing and your experience with it
31 ) a portrait of your shadow self (let’s get jungian)
32 ) fictional and/or real witches you admire
33 ) past lives, if you know of any
34 ) how to contact you from the afterlife after you’re dead
35 ) psychic abilities
36 ) pop culture magick
37 ) photos of nature
38 ) your own alphabet or secret code
39 ) a letter to yourself in the future and/or the past
40 ) altars and altar planning
41 ) magickal moments of your life
42 ) smells of witchcraft you love
43 ) descriptions of places from astral travel or meditations
44 ) reasons you started to be a witch, magickal goals
45 ) letter to a deity, an ancestor, etc.
46 ) what your followers would leave you as offerings if you were a deity
47 ) draw or collage your own tarot card(s) ; you can make them more diverse than the original!
48 ) creae a magickal creature that would be your familiar
49 ) spiritual diary (how a spell did or didn’t work, or a tarot reading, for example)
50 ) a shiny page to scry with
Church of the Morningstar 