Write your lines out. Try writing your lines out by hand — do not type them.
As you go to sleep ask your unconscious mind gently to assist you to (say this "help me learn the lines effortlessly, quickly and easily"
Run lines with a scene partner - another actor. Not the postman.
Go for a walk in the open Air. As you walk say your lines (Proven Neuroscience that actually works). Take a nap. Meditate.
Learn the cue lines. Use the learning lines app. Enjoy the opportunity.