Remember conjugations by drills

One donor to my French word project (see Availability near the bottom of yong321.freeshell.org/lfw/) asked me if I had a good way to learn/remember French verb conjugations. Unfortunately, no, I said to him. The answer would be the same if the language was Spanish (or another language). Just like other students, I learn the conjugations by drills. Sorry. Etymology and mnemonics won't help. To learn conjugations for an exam, you can learn them by heart in drills, even though you know the memory won't last. To aim for keeping them in your brain for a long time, just do a lot of reading, and/or listening. Mnemonics may be useful in very limited cases. For example, if you aim for mid-term memory, without much exposure to the language, and with no exam coming soon. But if you think about it, variation of verb conjugtions is so limited compared to vocabulary, so using mnemonics is not really worth it. Irregular verbs may benefit from mnemonics because each form is like another word. I could start to amend my book maybe with an appendix on that. But most irregular verbs are frequently used words anyway, and be aware of the fact that using mnemonics drags down fluency, at least at the beginning. Considering pros and cons, I'm not sure if creating mnemonics for them is really a good thing.