You could end up with a monster comment trail here! A quick stab but hopefully useful to you:

A good quality battery pack for your phone of choice. 20000 mAh should charge any phone from flat 5x or more.

Burpees - an absolute punk of an exercise but great for all round fitness.

Carbs in the morning (to burn in the day) or at night (better sleep), not both if possible.

Good luck!