You seriously can't start without materials. Keep the following things always handy while making stuff-
-pencils (all-2b, 4b, 6b... and hb)
-a pen
-variety of cardstock
-different kinds of paper
-different kinds of fabrics
-glitter pens
-ruler
-geometry case
-glitters
-ribbon
-paints (poster and acrylic)
-glitters (3-d as well)
-stickers
-PVA glue
-scissors
-decorating stuff such as:
-beads
-shells
-ribbons
-feathers
-confetti
-sequins
-sequin tape
-etc.
-natural stuff such as:
-leaves
-twigs
-flowers
-buds
-etc.