Shift of mental set:

Google: Task switching studies voluntary task switch

Google: Scholarly articles for task switching studies voluntary task switch

Reasoning:

Mental Models, Ruth Byrne's website

Synaesthesia:

Recent publications on Synaesthesia or Synesthesia
Hearing colors, tasting shapes, por Ramachandran y Hubbard (artículo en PDF)
Dr. Hugo Heynman, "Museums of the Mind" - Synaesthesia
General issues on synaesthesia
Asociación Internacional de Sinestesia
Artecitta

Mirror neurons:

Departamento de neurociencias de la Universidad de Parma
Nova Science Now: mirror neurons

Conciousness:

Science and Conciousness Review
Psyche, an interdisciplinary journal of research on consciousness
Concepts of Conciousness
David Chalmers' personal website
V.S. Ramachandran personal website
The Qualia Manifesto

See "webgraphy" in chapters of the book "The Puzzle of the Brain: Conciousness".

Neuroestética

Institute of Neuroesthetics
International Network for Neuroaesthetics

Neuroeconomía

Erasmus Center for Neuroeconomics
The Duke Center for Interdisciplinary Decision Science

Groups and institutions:

Faculty of Psychology, Granada (Spain)

Neuropsychological rehabilitation

Google: Attentional rehabilitation
Google: Working memory training

Attentional rehabilitation

Others:

Neuroscience for kids
The whole brain Atlas
Bernhard Hommel's website
Department of General Psychology of the University of Padova
Visual Illusions
Illusions Gallery
Brain games and mind puzzles
JCS, journal of Consciousness Studies
Society for Neuroscience
Project Big Ape