Few times a year I take all my magazines, go them through and take everything out that interest me... It can an atmosphere, scenery, colour, image of the room, accessories, paint effects or even articles about DIY, etc...Sometimes it takes half of the day to do all these but it can be fun on the rainy day...
So to make your deco books you need a pair of scissors, plenty glue and visual diary books, the big ones are better than the A4 size, you can have a really nice collage on your pages...
Buy several visual diaries and make you books by theme, I have made for example a book for any kind of paint effects and colours, rustic chic, country style, then you can just assemble on one or two pages different bath rooms, bed rooms, kitchens etc and add different pictures of accessories that goes with these pictures.
This is really fun, creative and it is also relaxing...Collect your own dream house or houses...