Joshua 1:8 says, "This book of the law shall not depart out of
thy mouth; but thou shalt meditate therein day and night,
that thou mayest observe to do according to all that is written
therein: for then thou shalt make thy way prosperous, and
then thou shalt have good success."
So, what does it mean to meditate in God's word? It means
to ponder God's word. Contemplate it. Mutter it. Declare
it . I would say declare it out loud boldly. Mediating in
God's word would involve studying it. In other words,
saturate yourself with God's word, especially the promises
you have been given in the word of God.
Example: "I can do all things through Christ which strengtheneth
me and no weapon that is formed against me shall prosper." - Philippians 4:13 and Isaiah 54:17. As you meditate and personalize
these scriptures, boldly declaring them out loud, faith will come and
you will begin to believe what you are saying is true in you.