I like the rule. I'd suggest to try also with a step in between. Something like: try for 15 minutes, if you still can't find the solution, go for a quick break

I like the rule. I'd suggest to try also with a step in between. Something like: try for 15 minutes, if you still can't find the solution, go for a quick break, like getting a coffee, and if the solution still doesn't magically appear, ask someone. I lost count of how many times I solved a problem while getting up to get coffee, after trying hard to find the answer for a few minutes. I can't be the only one.