How a good memory makes you a better musician
Memory plays a critical role mostly because it frees up the musician to be more expressive. If you are putting all your energy into trying to remember what the next note, bar or phrase should be there is little left for expression. A good memory also allows you to learn at a faster rate. For example if you memorise scales learning melodies becomes easier because most melodies revolve around scales. The same can be said for chord patterns, song arrangements, cadences and so on.
The secret to a better musical memory
Musical memory is mostly about pattern recognition. When I was a teenager I learned 12 bar blues for the first time. At the time I had no idea what I was learning but it soon became apparent that it was a template to most blues and early rock n roll. Once I understood this pattern I was able to easily recognise a song that matched this pattern. When you learn a new song look for the patterns. You will be surprised how many so called original songs are based on well known songs. Pop songs almost always match a familiar pattern.
Develop your memory
Here is a website where you can do some musical memory training but its best to work with a teacher as they will be able to quickly identify the areas you need to develop.
The G4 GUITAR METHOD.
A structured proven method of learning guitar.