One’s mobile phone can be an enormous help in Scripture memory. I put my memory passages onto Evernote and carry them with me wherever I go. It’s the modern equivalent of the old Navigator verse packs, bless them. There are also Scripture memory apps.
But the best tool of all, as far as I’m concerned, is the Camcorder. (A regular voice recorder without the “Cam” feature would do fine, but I can’t seem to find one of those on my smart phone).
Most mornings during my quiet time, I practice quoting my memory passage into the camcorder on my phone. Then I listen and compare my attempt with the page in front of me. I spot my mistakes. Sometimes I break down at the same place over and over, but as I keep repeating the passage and coming to that spot, I begin to get it right. I’ve found this enormously helpful in memorizing Psalm 46, where for some reason I keep getting hung up with verse 6.
Simply open your Bible or the memory-verse page of your journal to the passage you’re working on. Read through it, then avert your eyes or cover it with a piece of paper. Try quoting it into your Camcorder. Then listen and correct yourself. Give it two or three run-throughs a morning, and pretty soon you’ll be on auto-correct for the difficult portions, and you’re well on your way to memorizing the passage.