Write down all the great things about everyone you know.
Make a huge list of all the wonderful things about you.
Compliment people wherever you go.
Praise every single thing you see.
Be a ray of sunshine to everyone you meet, and make their day better for having seen you.
Say "Thank you" at every turn.
Walk, talk, think, and breathe appreciation and gratitude.
When you do this, your outer life will change to reflect your inner state of being.