Divide and conquer. I rarely learn a song by learning the song all the way through. I'll break it down into manageable phrases, then use a metronome or drum machine to play that phrase over and over until it's burned into my thick skull. Gradually piecing them together until i'm playing the whole song all the way through.
Even with that I still forget the easy stuff sometimes. At practice the other day I actually forgot how to play "House of the Rising Sun" for the first couple of bars , which is a really fun and easy song if you've never learned it.
Even with that I still forget the easy stuff sometimes. At practice the other day I actually forgot how to play "House of the Rising Sun" for the first couple of bars , which is a really fun and easy song if you've never learned it.