Music and Attention.

[Geingart]

Sometimes Music can be a trigger, but sometimes can be a way to avoid daydream. The trick can be listen music with a slower rhythm that the one we use while daydreaming 

http://freemp3x.com/brain-concentration-music-training-mp3-download...
www.youtube.com/watch?v=ARlm5Zn9EI4

This have quite good music 

www.audionetwork.com/production-music/mood-emotion/mood-emotion/hyp...

And above all, the big master, Erik Satie. 
www.youtube.com/watch?v=dtLHiou7anE

[Elemra]

Thanks for sharing the links. I'll try to experiment with the music while studying to see if I get any improvements. =)