1. Classical Music: Often referred to as the "Mozart Effect", listening to classical music can enhance mental alertness and memory. Compositions by Bach, Mozart, or Beethoven can be particularly beneficial.

2. Ambient Music: This genre is designed to be soothing and engaging without being too distracting. It often includes elements of nature and soft, flowing melodies.

3. Instrumental Music: Without lyrics to distract the mind, instrumental music can provide a calm, focused environment. This can include genres such as jazz, blues, or even instrumental versions of pop songs.

4. Chillhop/Lo-fi Hip Hop: These genres have gained popularity as study music due to their repetitive beats and lack of distracting lyrics.

5. Soundtracks: Movie, video game, or TV show soundtracks can be great for studying, as they're designed to provide background noise without pulling focus.

6. Electronic Music: Certain sub-genres of electronic music, like downtempo or ambient trance, can be good for maintaining focus due to their steady rhythm and lack of lyrics.

7. Binaural Beats: This is a form of soundwave therapy in which the right and left ears listen to two slightly different frequency tones yet perceive the tone as one.

Remember, everyone is different, so it's important to find the genre that works best for you.