There are three parts of Joshua 1:8 that God has provided for meditating on His Word . . .
The enemy, Satan, loves to thwart what God has designed and established for His people. Perusing through a self-help section of a bookstore, you will find many books about mediating - "10 Ways to Meditate" or "Finding Your Place to Meditate." Know that every time Satan devises smokescreens, he is definitely counterfeiting something real and established by God. The devil never created anything! Since he is the father of lies, he falsifies and imitates the things of God. I have found that God says a lot about meditating and specifically meditating on the Word of God.