I see so many of them around today but I am always skeptical of the scientific validity of them. I’m happy to pay a reasonable amount and I greatly value privacy. Main thing for me would be trying to improve memory.
Any recommendations are appreciated! If I need to go out and buy a DS and a copy of Brain Age, so be it.
Take this course. You can do it for free. At least that was the case a couple years ago. Free version does not provide certificate of completion.
Really worth the time and effort!
Learning How to Learn: Powerful mental tools to help you master tough subjects