This is not a magic formula. We cannot whimsically and recklessly speak God's words and expect anything to happen. God is very purposeful. We are not doing our will, but His. We must be led by the Spirit.
Years ago I read where the late, beloved Pastor John Osteen of Houston advised that the major test of whether we are being led by the Spirit is not the presence of goose bumps, but whether or not we are acting and speaking in love and not out of any selfish motive. Osteen pointed out that "God is love" (1 John 4:8), and He works through love channels. We must make sure that we are motivated by unselfish love and compassion for another person or persons.
If you are sure you are acting in love and compassion, then by faith begin to speak God's words to people in their need. You will be amazed at what happens and how God backs up His own words.
If people need salvation, speak God's good news (gospel) to them (Mark 16:15).
If people need healing, speak God's healing words to them (Mark 16:16-18).
If people need a blessing, speak God's blessing to them (Numbers 6:24-26).
If people need peace, speak God's peace to them (John 14:27.)
If people need comforting, speak God's words of comfort to them (2 Corinthians 1:3-4).
If people need a sense of self-worth, speak God's unconditional love for them (John 3:16).
If people need provision, speak God's promises of provision to them (Philippians 4:19).
The potential list is endless.
Speak, believe, and expect results. See what God says:
So shall my word be that goeth forth out of my mouth: it shall not return unto me void, but it shall accomplish that which I please, and it shall prosper in the thing whereto I sent it (Isaiah 55:11, KJV).