I've been experimenting with heart rate training for a few months now and it's helped me become more mindful of my effort. One thing that's worked for me is to focus on my breathing and cadence to stay within my target zone. It's also important to remember that heart rate training is not a one-size-fits-all approach, so don't be discouraged if it takes some trial and error to find what works for you.
I use the treadmill as a supplement to outdoor runs. It's not ideal, but it helps with consistency. I focus on intervals and hill repeats to make it more challenging.
Good point about using HR as a guideline, not a rule. Maybe I've been too focused on the numbers. Thanks for the perspective.
Acclimation is key, don't rush into it.
Periodizing your training is a great approach. I've done it before and it helped me to improve both endurance and pace.
I always wear a headlamp and try to vary my route to avoid being too predictable. Also, I make sure my phone is fully charged and easily accessible in case of an emergency.