I only took one practice test so I can't comment too much on that. My humble opinion:
#3- I used Magoosh vocabulary and found it quite relevant. I say yes, get as many words in you as possible.
#4- My issue was time. I knew all the concepts but I couldn't get through the section. I say yes, the more examples you see the better. If you have a time problem like me, I'd suggest just reading and figuring out how you would find the solution, not necessarily performing every calculation.
#5- I'd give it a day, but casually try to get some extra vocabulary in. get a good night's sleep and eat a good breakfast, hit the gym if you can.
I didn't knock it out the park, but I studied for a couple weeks and hit my goals for reaching 160 (practice test scores were 155-ish)