I've been self locking on and off for about a year and a half but I can never keep going past a week. I want to go for 3 weeks now! Any tips and encouragement would be great!
Have someone else hold your key.
Use a safe with a timer lock.
This kitchen timed lock box goes to 41 days and is under $40:
https://www.amazon.com/Multi-Purpose-Kitchen-Containers-Addiction-Excessive/dp/B07XP2ZP6P/