What people are attached to can limit them. We all define our self and life by the things we focus on (or don't focus on). Check in regularly with attachments by observing what you focus on (or avoid focusing on).
Are your attachments still relevant to what you find important, or are they outdated habits? How do your attachments limit you? Can you be present with things, but also open to letting them go, instead of holding on too tight?
This article, by Diana Hill, for Insight Timer helps you think about non-attachment, and its connection to mindfulness practice.