Immersion is not an option for me currently.

Whatever you do, immerse yourself as much as possible in your circumstances. This most likely means having radio blaring in Hebrew most of the time when it's not actively obstructing whatever you're trying to do; plastering your living space with labels, adding Hebrew blogs to your blogroll, seeking social activities outside your comfort zone such as volunteering at a retirement home with lonely seniors or attending insipid school plays at your local center for Hebrew language and culture.