Getting fit is relatively straightforward. It is all via negativa things — simply get rid of the things which weaken you.
My simple prescriptions include stop drinking soda, sweetened beverages, stop consuming anything with fake and artificial sweeteners, stop eating bread, carbs, starches, vegetables and fruit, pasta, rice, beer, wine, spirits and alcohol, weed, drugs etc.
Also, don’t sit.
For positive exercises, do anything which promotes you standing.