There is a SIGNIFICANT penalty attached to not finishing the exam, especially if you're only getting to question 31. It's pretty vital that you teach yourself to complete all 41 questions in 75 minutes. I would time your practice -- don't allow yourself more than 2:30 (max) on any problem (practice or test or whatever) and only spend 3-4 minutes max reading RC passages. Develop an internal clock of what "2 minutes" feels like. At 1:30, if you have no idea/don't know where to start, ALWAYS guess and move on. Never stick around because "if I just had another minute I know I could solve it!"

It's better to finish the exam with several wrong answers than not finish it.

Improving timing with verbal has to do with 2 things, IMHO:

1. General fluency in English: if you have a difficult time reading complex material, especially if you're a non-native, then you need to work on improving your general knowledge of the language and your overall familiarity with it. Most people on this forum will agree that one good way of doing this is by reading high quality papers. This works just fine even if you are indeed a native speaker: maybe your day-to-day interactions in English generally do not involve complex phrasing/arguments, so you're just not used to the stuff.

2. Question types: are there any specific areas that seem more difficult to you? Maybe you should target your practice by addressing those weak spots... When we're not so sure about something, this tends to eat up a lot of time and mental energy. I know I had a pretty hard time with CR before reading the CR Bible and understanding specific question types... Same goes for SC: my hit rate stunk before I learned the patterns tested...