Changing from monthly to quarterly planning is working well for me at the moment. Daily and weekly reviews to ensure I'm on-track for larger, quarterly, initiatives.

I'm currently trying to implement more of Cal Newport's Slow Productivity methods, longer-term and higher quality work.

The idea is that you still get just as much done, and the work is higher quality.

As much being the quality of the output and the results, rather than the amount of tasks.