When you are a Christian you need to prepare before you participate in the Lord's Supper. Many churches will have a moment to pray before it is offered. In this moment you pray and meditate to make sure you are spiritually prepared to participate. However prayer and meditation works a lot better if it is a part of your daily life. At the Lord's table your focus is on remembering what Jesus did for you. You reflect on his past, repent your sins, and prepare to move forward with him.
You partaking in the Lord's Supper represents your relationship with Jesus. Are you approaching him in a worthy manner? Do not get overwhelmed in how you are not perfect or that your relationships are not all in great standing. Listen to how the Holy Spirit guides you as you prepare.
It would be worse if you thought you were perfect and participated. God wants you aware so you can surrender it to Him. Once you do, then you don't have to pick it back up. He will take care of it from there as long as you obey the Holy Spirit where He prompts to make changes.
Jesus knows your weaknesses, needs, and heart attitude. He works with you where you so you are to be able to have a real relationship with God. His expectations are that once you become aware of your sins, repent and sin no more. Make yourself pure for God. Release what makes you weak, weary, and burdened in life. Jesus is strong enough to carry it all.
The reason for meditation is to make sure you do not forget about Jesus, your purpose, and that your focus needs to be on the eternal instead of the right now. It keeps you in step with Jesus so you do not be led astray.
What you do for Jesus and in God's name will not be forgotten. You do not need to seek an audience. God will not forget, but if you seek reward on earth then there will be none in Heaven. You turn God's work into being about you. Meditation will help you remember why you are doing it. It is to glorify God not yourself.
Remember what love is according to God. It is sacrificial. It is passionate about righteousness. It sanctifies. It holds grace. It feeds your soul. Love knows how to forgive. Jesus shed his blood for your sins, so you could find peace. Your soul can have joy because of his love. If you accept his love, then God's wrath is removed from you for all eternity.
Psalm 23, Isaiah 55:1-5, Matthew 26:27-30, Luke 22:14-20, John 8:11, 1 Corinthians 11:27-30, & Revelations 3:20-22