If you finished studying Sacred Signposts, you might be looking for a new Bible study. I have a few suggestions.
If you just want a schedule of scriptures to read, turn to the back of your book and you'll find a schedule to read through Psalms in 60 days.
If you want to learn more about praying scripture, consider 31 Days of Praise or 31 Days of Prayer. Author Ruth Myers collected scriptures on various topics and phrased them as prayers. Each daily reading is only two or three pages long, and at the end it lists all the scriptures Ruth Myers used. If you use this in a discussion group, you might study three or four daily readings each week, and look up all the verses and talk about them. A leader could do a little prep work and find a few cross-references in her Bible to stretch the discussion time out a bit.
A great Bible study on prayer is Catherine Martin's Passionate Prayer. This is a 30 day devotional. For a group discussion, I recommend the Passionate Prayer Quiet Time Experience. This will have a little more homework than Sacred Signposts. You will look up a lot of scripture and read quotations from classic Christian authors. I highly recommend it.
If you want to learn about meditating on scripture and memorize a few incredibly encouraging verses, look at the Loving God with All Your Mind workbook, by Elizabeth George. I just finished using this workbook with a group of ladies at church, and we found we enjoyed it more when we did not use the DVD that can accompany it. There was plenty to think about and discuss in the workbook, and we wanted to spend our time in the Bible rather than watching the DVD. The DVD was an extra--it was not needed for the book. There is a longer version of this (not a workbook) but this one has more scriptures and is easier to discuss in a group setting.
If you'd like a book on the topic of praise, check out my Praise Patterns book.
In September I will have a new book available. The title is Only for my King: a Song of Service and Surrender. Its topic is serving God, and it will explore Biblical characters, historical Christians and contemporary Christians who served and surrendered to God.