We’ve talked before about the power of using the principle of via negativa to improve your life. Instead of focusing on what you should start doing to make your life better, it often pays to think about what you can stop doing. It’s addition by subtraction.

Some of the things you should eliminate from your life are easy to figure out: debt, toxic people, wasting time on the internet, porn, junk food, smoking, etc. These things have far more downside than upside, and if you were to remove them from your life, you’d see an immediate improvement in its quality.

But there are other habits, behaviors, and practices that aren’t wholly terrible, but might be holding you back nonetheless.

How do you figure out if you should eliminate these things from your life?

In his book The Effective Executive, management thinker Peter Drucker offers a simple question to help executives decide if they should eliminate programs or products from their organization. The question works equally well for individuals trying to figure out if they should eliminate something from their personal lives.

Sloughing Off the Past

According to Drucker, one of the things that most holds organizations back are its previously-made choices.

“Executives, whether they like it or not, are forever bailing out the past,” he writes. “Yesterday’s actions and decisions, no matter how courageous or wise they may have been, inevitably become today’s problems, crises, and stupidities.”

We typically make decisions based on doing the right thing, for right now. That’s often the best we can do. As Drucker notes, “man . . . cannot foresee the future,” and it’s difficult to impossible to know if a solution that fits the current moment, will also fit the circumstances a year or five down the line. You just have to move forward on the information you have.

But while there’s nothing wrong with making decisions based on what best serves our immediate needs, the problem, Drucker says, is that organizations and individuals often continue in servitude to these decisions, even when they stop providing significant ROI.

Thus, one of the main jobs of an effective executive is to continually “slough off the past that has ceased to be productive.”

To that end, Drucker recommends that executives routinely take part in “systematic abandonment.” Every few months, an executive should do a reevaluation of all the organization’s practices, looking at everything the organization is doing and deciding anew if the organization should stop or continue it.

In later articles, Drucker recommends that individuals engage in systematic abandonment to improve and keep their individual lives running at full speed as well.

Peter Drucker’s Question for Deciding Whether You Should Keep or Cut a Practice

Drucker notes that getting rid of failures is easy. “They liquidate themselves,” he writes.

The insidious stuff to slough off are the things that served us well in the past but will hold us back in moving forward in the future.

So how do you identify this dross and avoid continuing once-productive, now-potentially-burdensome successes?

Drucker offers a question that acts as a metaphorical machete:

“If we did not already do this, would we go into it now

If you can’t answer this question with an unconditional yes, Drucker advises immediately eliminating that practice.

Drucker’s question can of course help you trim away low-ROI-producing fat from your business. Maybe you started offering a certain service to your customers five years ago. It made sense at the time; there was plenty of demand for it, and for the next three years after its introduction, it brought in plenty of profit. But for the last couple of years, both demand for and the profit margin on that service have fallen, while the amount of effort it requires, and the headaches it produces, have stayed the same. If you ask yourself if you would introduce this service now if you weren’t already doing it, you’ll likely say no. So get rid of it! In so doing, you open up bandwidth to invest more in your other offerings, or to come up with something new that meets the needs of the current moment in time.

Drucker’s question can be applied to things like holiday traditions as well.

In the extended McKay family,