You can phrase useful advice in a "non-advicy" way. E.g. "here is how I do it..." instead of "it's better to do it this way/you should do it like this". This form sends an implicit message "there may be other, maybe better, ways to do it/YMMV".
The phrasing indicates whether the sender thinks of themselves as someone who has all the answers vs someone who just found out that something works for them.
Be careful with this, too. When somebody brings up problems they’re having, they often just want the catharsis of complaining and empathy about their situation. Proffering a solution, even couched as you have described, can change the conversation dynamic from empathy to a semi-combative back-and-forth which serves no-one’s purpose.
The phrasing indicates whether the sender thinks of themselves as someone who has all the answers vs someone who just found out that something works for them.