My glide path was 7 years.
In 2001, after I turned 38, I negotiated a part-time, mostly work-from-home deal. The long, sometimes sickening commute, which I had already so despised, had become too much for me (right, MarieIG?). I reduced my total weekly hours worked from 37.5 to 20 and reported to the office only 1 day per week. I had paid off the mortgage in 1998 so my expenses were much lower and I could easily afford them with a net pay of 60% of my old pay.
This new schedule worked out great and allowed me to regain control over my personal life. I enjoyed 2 new hobbies right away: I resurrected one from the 1980s and the other I had my eye on for a few years, anticipating such a big change in my schedule. (Both have since ended in the last few years for different reasons.)
This setup went well for 2 years and 3 months until the company ended all open-ended telecommuting in late 2003. I could keep the part-time weekly hours worked but now had to fulfill all of my hours at the office. I now worked 3 days a week but some of the horrors of the commute had returned. I knew this would eventually be my undoing as I increased my effort at find a way to fully retire soon. I was able to maintain my 2 new hobbies but it became more challenging with the added commute and its exhaustion.
I did this 3-days-a-week commute through 2004, 2005, and 2006. But it was becoming too much, with the only solution being the total elimination of the commute with a full retirement. Those RE plans were starting to fall into place as the company's stock price (ESOP) skyrocketed.
In mid-2007, I asked to reduce my weekly hours worked from 20 to 12. This took 1 day off the commute and shortened the 2 days worked to 6 hours each, getting me home from work an hour earlier. I also had to forgo most of the remaining fringe benefits I still had, including enrolment in the group health plan. I went on Cobra which would last for the next 18 months. However, I knew by the end of 2008 I would be retiring, as more pieces of me RE plan were falling into place, including health insurance when Cobra expired. Reducing my salary (again) was no big deal, as I could still easily cover my expenses.
By the fall of 2008, I knew the time was near. And the crashing markets actually made things easier because the big bond fund I would be buying into saw its price dropping like a big rock, while my company's stock price was holding pretty steady, creating a terrific sell-high-buy-low scenario whose financial benefits I enjoy today. (See my signature line.)
I put in my notice in late September and left on Halloween. That was 15 years ago and it has changed my life for the better. The introduction of the ACA's exchanges in 2014 has helped a lot, too.