Moredopamine
Bluelighter
Or you can use a combination safe and remember the numbers while sober. A blackout won't make you forget. Or store the number in a hidden computer file.
Can't you just break the damn thing open? Given sufficient time, all safes are can be opened by brute force alone. The main value of safes is a) in planned use like a bank or jeweler, they are designed to be hard enough to open such that it takes longer to do so then it takes it to get caught. or b) for personal types, it's probably not worth the effort.
never the less, no one is going to catch you breaking into your own safe, and it may be worth it. Humans have become very good at getting into places that seem hard to get into, on the easier side, there is dropping bombs from supersonic planes though reinforced concrete bunkers, on the more difficult side, there is taking a drill bit about a foot and half wide, lower it around mile under the ocean and proceeding to make a 35,000 foot deep hole though rock. I'm betting the challenge of opening a small safe can be completed with nothing overly exotic. Post a pic of the safe? Maybe BL can provide some insight on how to go about it.