For the most part, I think I can only tell you of the instruction I found in the Bible about what you are asking. This was taken from a letter by Paul and Timothy to all those living in Philipppi a long time ago:

It seem to be about having a good attitude as you try not to be anxious or worry about anything but with a thankful heart learn how to be satisfied with being alive and in good health as you try to fill your mind with those things that are good, true and pleasant to think about; Like having
some one to care about things you want to share; Things you like to do and most of all, how you would like to have God in your life.

In your prayers, He will be reading your heart as you talk to Him. And when you are reading His Word, you both will be getting to know each other.
Him by what He has said and done; And you by what you say and would like to do.

Then as you pay attention to whatever things are fair, just, lovely, nice
admirable, worthy and well spoken of; Whatever things are serious to you,
righteous, chaste, pure or clean, and whatever virtue there is, or that is praiseworthy; if you continue considering these things so as to practice
them; God's Peace which is far beyond human understanding will be with you
and your prayers will take place in your mind.

It has taken me a long time to find and do this. And I pray in my thoughts
things that I find hard to put into words.

PS=Phip.4:8-12