Following is the list of basic supplies that I would recommend if you would like to begin to art journaling. I will add to this and expand in recommended supplies over time.
Blank journal - should be a heavy-duty wire binding; here is one type that's available @ Plaza Art and is designed for art journaling or you may bring your own. http://www.plazaart.com/visual-journal-drawing-5-5x8.html The journal can be as large as 8.5 x 11, but smaller is better. These journals are also available online @ Amazon. The wire binding will allow for the extra space you may need for art that is dimensional (and you can remove unused pages if necessary.) The paper quality should be heavy-enough to take some moisture from ink, lightweight application of acrylic paint, gesso (a primer) embellishments (paper or other). Journal pages may or may not be applied with gesso, but gesso will offer some extra strength and prevent or impede bleeding of anything too wet. Some wrinkling will happen no matter.
Pens, color pencils, lead pencil (at least one), markers of any and all types. It is not necessary to purchase expensive pens and markers. There are two types of inexpensive markers that I've used with nice results (see pic to right.)Crayola Super-Tips are excellent all-around markers (non-permanent/non-archival) and should be available at most arts/crafts stores and online. (For proof of what is possible, see the bee post-card I colored to your right using Crayola Super-Tips. Faber-Castell, used in the strawberry post card at right, also makes an excellent value-line or kids marker widely available at stores and online.
Please note: Blending/shading and overall performance with high-end markers such as Copic and Prismacolor Premier and many other quality alcohol marker brands, (the alcohol marker market has boomed) are superior to cheaper non-permanent markers, but if you don't want to or can't make the investment, try some of the lower-priced markers. Sharpie comes to mind, and Bic Markit are good mid-range quality. One exception here is to buy a blending marker of some sort. I plan to offer some instruction on blending with markers, but there's a lot already on YouTube, so check it out.
Black liner pens - it's a good idea to purchase at least one permanent black liner pen .01 - .05 to emphasize or outline. Plaza Art has many to choose from. Sharpie also makes an ultra-fine point pen.
Very sharp scissors. Precision scissors are important and worth a little extra money. Kiddie scissors will not work here.
Glue/Adhesive: Elmer's Glue or Glue-All (small bottle)or Glue Stick or any glue recommended for paper. Small adhesive rollers are also good, but you'll go through them quickly if you have a lot of pages. Stay away from the super-cheap glue sticks...they're only good for the kiddies gluing construction paper.
Eraser(s). At least one white eraser (will not leave color behind.) If you do not have a white eraser, there are many to choose from. A kneaded eraser is also suitable, but white is better.
Inexpensive set of at least 6 colors of acrylic paint. The Liquitex Basics set of 6 is good, but you can choose what you like. Here is a link: http://www.plazaart.com/basics-acrylic-22ml-6-tube-set.html
Clip art, photos (non-licensed) and other ephemera (items of collectible memorabilia, typically written or printed ones,) that you would like to use in your journal. Whatever you use, remember that it may accidentally get damaged, (spilled glue or paint) so if it is precious, please make copies to use in your journal.
Many other elements can be used in mixed media. Of course you'll want to use interesting paper to cut and paste in a collage-like way, but then you can have buttons, stencils, cheap but interesting broken jewelry and beads (flatter is better) fabric, string, wire, watch parts, small gear parts, foils, wood, molded clay (paper clay is best as it's lighter weight) and more. Get ready to be inspired and have some fun!
Colored with Faber-Castell DuoTip Washable
Colored with Crayola Super-Tips