Are you having trouble getting that layered look in your art journal? I get alot of questions about this! Let talk layers using a template. Bear in mind throughout that your layers need to be translucent or spotty. In other words, don't cover the entire page with acrylic paint or gessso.
Layer 1 can be writing or a splash of color with stenciling or stamping. These textural type of stamps or pattern stencils work very well. Work in three colors on the same side of the color wheel: Warm OR Cool, to avoid making mud where you don't want it.
I like to go a little heavy with the color and then tone things down with gesso. A thin coat of gesso will be see through and unify things. Choose three to five areas on your page spread and try using brush strokes that are light and feathery. I used a stencil with texture paste on this page too.
If you are using collage, paint, sand or gesso around it to "bury" it in the page. Hard edges will call too much attention to the collage piece when you want it to become a organic part of the page.
Keeping with the translucency, use tissue papers to continue building pattern and color. In the picture above, Tim Holtz paper is acting like gesso by subduing the background while letting the pattern come through. I could have found some central imagery for this page but instead, I just did some writing and drawing. With black pens and gel pens.
Working in layers takes time and thought. It's fun and unpredictable to work intuitively. Sometimes it's a challenge because things don't go as expected so you may need to put your critic in the other room. Let us know in the comments if you have any tips on layering. I'll put some of the products I used in the links below. As usual, they are affiliate links and I get a little cash back if you buy from me. Use.What.You.Have.