Do you guys have any trick or strategy for deep work and focus?

Drugs by addiction potential (Max=100) 1 Nicotine (100) 2 Smoked methamphetamine (98.53) 3 Crack (97.66) 4 Methamphetamine injected (94.09) 5 Valium (Diazepam) (85.68) 6 Methaqualone (83.38) 7 Secobarbital (82.11) 8 Alcohol (81.85) 9 Heroin (81.80) 10 Oral Amphetamine (Crank) (81.09) 11 Cocaine (73.13) 12 Caffeine (72.01) 13 PCP (Phencyclidine) (55.69) 14 Marijuana (21.16) 15 Ecstasy (20.14) 16 Hallucinogenic mushrooms (17.13) 17 LSD (16.72) 18 Mescaline (16.72)

My numbers are far from elite, but its honest work: - I run 1 kilometer in 5 minutes. - I swim 1 kilometer in 20 minutes. - I climb 6a to 6c routes.