I played this before I prayed every day for a week or two just to remind myself who I was praying to.

I've used this for years with different categories labelled (family, god children ECC) and then index cards that have someone's name on them. I then go through each category each prayer time and pray for the person at the front, before moving them to the back of the section.

In 9 short chapters Hill explains the Lord’s Prayer in a way that inspired me to pray it more and preach on it. I took it on holiday and read a chapter each morning

Keller takes you through one Psalm each day, helps you apply them and offers a prayer at the end. It's a refreshing reminder of the joy of praying daily and guides you through the days you feel meh. It has encouraged me to remember to praise God in prayer.