On creating a feedback loop… If you work with other designers everyday it’s pretty easy. On the otherhand, if there aren’t many others designers near you, I would suggest establishing an online network of peers you can ask feedback from.
These communities are great for one time critiques but I would suggest reaching out to people with the most constructive feedback and keeping in touch with them, whether that be through Twitter or email.
Personally, I use Twitter as a way to interface with all of the great designers I’ve met online. Once you have a few contacts, you can always reach out to them for feedback.
Also, I love helping out fellow designers so if you ever have a question or need feedback, hit me up on Twitter!