This week's bulletin at my parish included a good mnemonic exercise for praying (well, more of the petition aspect of praying, but you can insert "gratitude" into each item as well, to complete it). It's called the Five Finger Prayer :
Your thumb is nearest to you. So begin your prayer by praying for those closest to you. Pray for your family and your friends.
The next finger is the pointing finger. Pray for those who teach, instruct, and heal. This includes priests, deacons, religious Sisters, teachers, doctors, nurses, judges, attorneys and all counselors. They need support and wisdom in pointing others in the right direction. Keep them in your prayers.
The next finger is the tallest finger. It reminds us of our leaders. Pray for our religious leaders—our Pope, our Bishops and Pastors. Also pray for our President, all government leaders and all leaders in business and industry. These people shape our church and our nation and they guide public opinion...