Best writing advice I’ve gotten? What sticks with me is something from a plotting class I took with Delilah Devlin. She calls it three bumps and a push.
In other words, throw three roadblocks into your plot, each worse than the last. Then add one final thing that seems like it can’t be resolved, the final crisis. Of course, your characters do overcome that last big problem and go on to live happily ever after. This framework is so simple even I can follow it.
Clearly, there’s much more to writing than this. I can’t wait to read other good advice from fellow authors here.