So there are a couple of different questions here: verbal timing strategy and keeping track of your time. Let me start with keeping track of your time. David has given you a good time standard if you want to keep track at the level of every few questions. Another option is to work at the best pace you can and check before question 20 - you should have about 40 minutes left. What if you are a little behind? Well do not rush, but try to keep going at a good pace.
As to the actual timing strategy for verbal I can sum it up in two words. "Trust yourself." On the Quant section people are often slowed down by actual calculations as well as by figuring out how to attack the problem. On the verbal there are no such considerations. You do not have to calculate and their is no mystery as to how to begin. The problem with Verbal is in eliminating answers and especially in choosing between the last two choices.
Here are some thoughts:
Don't spend too much time deciding between the final two choices. Reframe the question if you need to on CR, look up the info on RC, and compare the choices on SC. But just don't spend too much time going back and forth. Use your procedures and trust yourself.
When you have eliminated an answer choice it should stay gone throughout the entire verbal section - perhaps especially sentence correction, which is why I wrote this article:
https://www.beatthegmat.com/mba/2011/01/ ... correction
If you work forward only in verbal and move through the questions according to your methods and techniques you can eliminate most timing problems!
