Early in my adult life I took a printed Bible and, as time permitted, underlined passages in a few different colors as I read through the New Testament, Psalms and Proverbs on my own. I underlined in green those passages describing some aspect of God's love for us (Gospel); I underlined in red those passages describing an instruction or command of God (Law). The colors blue and black were used to annotate passages in other ways.

For me that was a fruitful approach. Continuously considering how to underline the text according to a simple color scheme kept me engaged and helped me to retain more of what I read. I also discovered meaning that I might have missed otherwise. (Where understanding a passage became a struggle, I did not get bogged down in my reading but moved on to find the next verse that spoke plainly.)

It has been decades since I went through a large part of the Bible that way. I did not attempt to memorize verses as I went along, but it seems now that many of the verses that I underlined or annotated then still encourage and edify as they come to mind in Bible study discussions and my devotional journaling.