Prayers are a kind of mind-transformation tool. They work both internally and, it is said, externally.
Because it is essential to study or practice Buddhism in an altruistic frame of mind, this set of prayers is designed specifically to be used in any kind of study or practice situation.
When you study or practice, you should say all the prayers in the "Prayers Before Study" section first, then do your study or practice, then say all the prayers in the "Prayers After Study" section, then any long life prayers you wish to say, and wrap up with dedication.
If time is short, the most essential prayers are "Refuge and Bodhicitta" at the beginning and "Dedication" at the end.
Check out additional prayers and Sadhanas at TsemRinpoche.com, here!