I've been working out of the Hal Leonard series, and while playing I've tried not to let myself memorize the written music, even as I may memorize the melody by ear. My thinking has been that this would help my sight reading later on. Lately it has occurred to me that this might be detrimental to my general learning to read music. Should I be letting myself memorize the written music?
How do you avoid memorization and learning the melody? Also how can this possibly help you?
For most people in most situations, reading music goes hand-in-hand with memorization. Basically you play a part to the point where you no longer need to read note-for-note. Each section of the music then becomes sort of an archetype or symbol that let's you recall and play the part without focusing on each note.
The only time when this is not relevant is when you are sight reading. Sight reading may involve music you have never seen or music you have not seen for a really long time.
You can try to read note for note all the time, but IMHO it's not beneficial to put so much focus on the notes. There are a lot of processes going on simultaneously when you play music, and there is not enough mental focus to keep track of all of them. Therefore it's necessary and beneficial for some of the processes to be automated.
In reality, when you get really good at sight reading, you frequently are not really reading note-for-note. Rather you know the key center so well that you don't have to look at each note. You might see step-wise motion or arpeggios that you play automatically. What should stand out is accidentals written in the music.
Ideally you also know common rhythmic patterns so intrinsically that you just play them without having to figure them out.
Of course if you are just starting to read, it's most likely going to take years of regular practice to get to the point where most of the process is automated. IMHO trying to avoid memorization is the opposite of what you should be doing.
If sight reading well is your priority, then IMHO the trick is to constantly read new material that is right at the edge of your abilities.
When I work up material for a concert or tour, I review all pieces of music to identify the sections I need to work on. Then I cycle through each section. I start by trying to work out the fingering. Each time I cycle through a section, I start a bit slower than I ended on the previous cycle and then try to work it up a little faster. I find it's best to move on to a new section before I get too frustrated. IMHO pushing too hard can cause mental blocks that prevent progress.
The goal is to master each section a bit faster than it will be performed. When a section is mastered, it is set aside until the next practice session. It's normal to loose some proficiency between sessions. So when you start a new practice session, you may want to add some previously mastered sections back into the rotation. It may take multiple sessions to truly master everything, so that you can play it cold.