You may see me at times praying with a small black book. This book comes from a 4 volume set of like books, which contain various prayers to guide the spiritual life of religious and priests throughout their day. These prayers are primarily from scripture and are comprised mainly of the psalms, but also include other scripture accounts from both the old and new testaments.
The following article from Aleteia.org explains well what this is and its importance in the life of a parish priest like me. Every good priest knows that if someone can say something well then let them say it for you! Please take the time to read this article. It gives a good explanation about what I am praying during the day and its importance for me and for you!