Let's keep this simple. I consider what am I going to do with this new computer. For me, it is a combination of hobby computing, business needs, and personal computing.
I am seriously considering an Apple this time. The Apple will fit my business needs with both software and the Microsoft offering I can be compatible with the office.
The main reason I am considering an Apple is money...
One tip I learned while in university is the relationship between sleep and retention. For mathematics, I would save the last 30 minutes of studying for math. Then I would find the problems I needed to practice and practice them until I got ready for bed.
Then I would leave a mental picture of the homework and problems in my head for practice while sleeping.
I found I would think about...