Things that shift the Demand curve:

  1. Income
  1. Normal good
  2. Inferior good
  1. Price of related goods
  1. Substitutes
  2. Compliments
  1. Population
  2. Expectations
  3. Tastes and preferences

Things that shift the Supply curve:

  1. Cost of production
  2. Number of sellers

Price NEVER shifts either curve! It only moves along the curves.