Here are some Amazon links to just some of my favorite necessities
Note: all prices mentioned are due to change on Amazon. These are what they were when I first posted them.
Colored Pencils, Chalk Pastels or Oil Pastels
Bulk - Neenah Exact Vellum Bristol, 8.5" x 11" 67 lb ($10.25)
Strathmore Colored Pencil Paper
Strathmore 300 Series Bristol Vellum Paper
Strathmore 300 Series Bristol Smooth Paper
Strathmore 400 Series Bristol Vellum Paper
Strathmore 400 Series Bristol Smooth Paper
Strathmore 300 Series Mixed Media
Strathmore 300 Series Drawing Paper
Markers: Acrylic Ink or Alcohol Ink
Bulk -Neenah Paper Exact Index Card Stock, 110 lb ($11.98)
Strathmore Marker Paper Pad-50lb Smooth
Strathmore 300 Series Mixed Media
Strathmore 400 Series Bristol Smooth Paper
Strathmore 300 Series Watercolor Paper
Strathmore 400 Series Watercolor Paper
Watercolor Paints or Watercolor Pencils
Bulk -UCreate Watercolor Paper, White, 9' x 12" 90lb ($11.98)
Strathmore 300 Series Watercolor Paper
Strathmore 400 Series Watercolor Paper
Colored Pencils
Prismacolor Colored Pencils Art Kit Soft Core Pencils 150 ct ($189.99)
Faber-Castell Polychromos Artists' Color Pencils - Tin of 120 ($162.93)
Derwent Coloured Pencils, Inktense Ink Pencils 72 count ($157.64)
Acrylic Pens
Mogyann Markers for Adult 100 Colors Dual Tip Pens ($26.99)
Arteza Acrylic Paint Markers, Set of 40 Acrylic Paint Pens ($38.99)
Alcohol Pens
Ohuhu Alcohol Markers
Honolulu B Set (1) 168 markers Brush & Fine Tips ($124.99)
Honolulu Set (2) 104 markers Brush & Chisel Tips ($79.99)
Honolulu B Set (3) 48 markers Brush & Fine Tips ($39.99)
Oahu Set 320 markers Chisel & Fine Tips ($169.99)
Chalk Pastels
KALOUR Pro Pastel Chalk Colored Pencils, Set of 72 Colors ($35.99)
Oil Pastels
KALOUR 72 Professional Colored Pencil for Coloring, Oil-Based ($23.99)
Watercolor Pencils