In general, it's important to simply start seeing how you do tasks. Take note of which hand, foot, etc you use to do something and ask yourself why you do it that way. If it makes sense to switch, think through how you do it step by step and then begin to practice opposite-handed, footed, etc. Here is a list of a few things to pay attention to that might help you start thinking.

• The hand you...
  • eat with.
  • drink with.
  • use primarily when you cook.
  • comb your hair or brush your teeth with.
  • tie your shoes with.
  • shave with.
  • drive with.
  • tie a necktie with.
  • reach to pick up an object with.
  • write with.
  • use a mouse with.
  • wear a watch with.
• The foot you...
  • step into your pants first with.
  • kick a ball with.
  • step out with first when you walk.
• The thumb you use to push spacebar with on the keyboard
• The direction you stir your coffee: clockwise or counter-clockwise?
• The leg that is in front when you sit cross-legged or on top when you cross your legs.
• The hand that is on top when you cup your hands to drink water or fold your hands together.
• The eye you wink with.
• The contact lens you put in first.
• The direction you wind your belt around your waist.
• The direction you hang your clothes on hangers and in your closet.