I think for me this is less about how I can set better boundaries and more about how I can maintain my boundaries.  I am pretty proud of this accomplishment actually.  I set some very strong, very restrictive boundaries on myself and contact with people who antagonize me, are dishonest with me, and have no genuine interest in my well-being.  I've gone into zero contact and I've maintained that for over a year solid.  To a lesser extent, I have used those boundaries with others, keeping those at arm's length who I don't feel a solid trust and connection with, and reminding myself that not everyone in my "friends" list needs to be privy to all my details.

Still, to answer this question I guess right now I could separate home and work better.  My job runs 24/7 and I am the sole person running the branch here so texts and phone calls for after-hours issues are common.  Usually, I answer them and stop my life to fix it, but I need to start redirecting them to our on-call person and refusing to check my work phone during unpaid hours.