Applying Verbal Strategies

I’m currently on week 3 of the 2 month study plan and I’m hoping to get some guidance on how to effectively apply verbal strategies. For example, if I apply the math strategy and I don’t get an answer which strategy should I use next and at what point do I guess and go on to the next one?

You can see this video for tips:

https://www.gregmat.com/class/4-keys-to-a-high-verbal-score-january-11-2022/

From 25 mins onwards.

Thank you