When it comes to sketchbooks I will use just about anything! From drawing paper to watercolor tablets to tiny little pads of paper to index cards I always find a way to put a variety of paper to use. My favorite sketchbook to use is a an all purpose sketchbook (any brand- size 5.5 x 8.5 - typically 65lb sheets of paper). They are affordable and work great for me. While the paper is not made for lots of wet media (like watercolors or even acryclic paint) I still use it with anything and everything.
Water resistant pens are great to use if you are working with wet media- like watercolors- because they don't bleed when you paint over them.
1. micron pens 2. sharpie pens 3. ball point pens
1. water brush 2. pentel and pilot pens 3. ball point pens
Water based pens are great to use by themselves or with a little bit of water and a brush. Instantly you can transform a drawing into a watercolor by brushing water onto your pen sketches. You can take a look at how to use a water soluble pen in this post here
This should answer the basic sketchbook questions that I seem to receive over and over again! For more details and the complete run down of techniques- check out my online classes- Sketchbook Delight and Sketchbook Delight Part 2 and Watercolor Bliss they all cover most of the process and techniques that I use in my sketching.