My price book is in my house book, its a thick note book with four sections. Heres how i do mine;
first section; a list of things i alread have in the cuboards, lists of collections eg tuskers models so i dont buy the same one twice,dates and places i have brought things ie washing machine, how much,where,where the instructions and garentee are stored etc. whats in my preasent cuboard etc.
Second section; a price book devided into types. ie freash food, tinned food, baking stuff, drinks ect,. I write in the price i paid and where and change it when i find it cheaper some where else.
Third section; Random tips and recipes that i always need to hand, or jotted down as i find them, various dates and times of things ie when to plant certain veggies
Forth section; things i`m looking out for, shopping lists, vouchers, jobs that need doing, things to remember, etc
I always have this book on me where ever i am, so the info is always to hand and i always know what i need and dont need.
I write it in pencil so i can change things and erase things as needed so no wasted paper etc. And i keep it up date almost everday here and there as required. I would recommened it if you are prone to forgtting things or mislaying things and i have certainly got a lot better with my shopping habits etc from keeping one
Hope that helps a bit
kind regards
fishcake