Learning lyrics

I have set myself a challenge of learning the song Aguas de Marco, by Antonio Carlos Jobim. It is 89 lines of mainly non repeating lyrics. It's like a non-obviuos list. I love the rhythm of it and I'm going to know it soon. I started months ago, learned about six lines and then got bored. My renewed interest has meant I now know 35 lines of 89. I love singing it. Walking helps. learning in small bits really helps but the sequence from the beginning seems to be very important. This is the Portuguese version...that would be amazing to learn... the sequence from the beginning seems to be very important. I restarted learning the song on August 9th. in 8 days I have 39 lines. Goals are important. Then the tricky part is maintenance...keeping the lyrics in there. Almost a daily work-out! I should know this song in 14 days time. August 31st!So then I need to perform it in front of people. CHALLENGE!