In an age of lots of information about training for climbing, so many either get injured or fail to make progress because of the basics. Right now, as I come back from an injury, I am building a foundation of physical capability. A foundation of sleep, recovery, gradually increasing load and consistency.
A core principle of doing well in sport (or other things) is to find ways to turn bad circumstances large and small to your advantage as much as possible. So many training decision pathways start from this principle, or at least should do.