I have been less active on this site lately, but thought I'd dip in with a little exercise I recently performed and find extremely useful for focus and prioritization.
Sounds simple, but as an engineer type, with a propensity for working on just the interesting bits I have found it helpful. And no, 50 is not too high.
50 is enough that engineering types get past specific actionable code-centric items and stretch into the business operational tasks. I can't stress how important it is to get the business stuff on your radar and on your calendar. For non-engineering types, it's big enough that you'll need to stretch into the engineering zone, which is also important for planning and sales. Breadth of though is important. It's also helpful to make obvious (by way of a big pile of things to do) that you might need to enlist some help in certain areas.
So do the stretch, make the list, come up with 50 things, prioritize them, and spread them out on your calendar over the next 30 to 60 days....then start executing.
I'm always on the lookout for strategies.
What other periodic exercises do you do to keep yourself out of a rut? Share for your IH brethren.