A minor tip is you can observe distribution of transaction fee on each chain and see within what hours, transaction fee will be usually cheaper than other hours. Weekends will have less activities on chains so on weekends, you can have cheaper transaction fee than on other days.
Is it true that there are certain times that provide lower transaction fees?
All this time I did not know about this because when making each transaction I did not really pay attention to the fees I had to pay.
After all, I am a small gambler, so every transaction I make is never with a large enough nominal amount so that the costs I need to pay are relatively low.
If indeed this is real, maybe it can be a reference for me later if one day I get a big win and want to withdraw all of my winnings so I can save on transaction fees.