Constant GMAT scores inspite of 1 month of practice

Well, there's a lot of variety here. Is it every question type that is taking too long, or is it one particular type of question? Do you go a little bit long on *every* question or do certain questions 'eat up' a lot of time?

If it's a few questions that go very long, you need a better antenna for skipping (and probably the realization that your goal is not to 'get every question right.'

If it's a single question type that goes long, but other types don't, you might have some conceptual weaknesses on how those questions really 'work.'

If all questions go a litttttle bit long--again, you might consider 'skipping' more often to catch up. But for the purpose of practice and review, get a clock out and when you do a question, really reflect on where the time went. What did you do/think about on that problem that helped move you 'forward' on it? What did you do/think about that only ate up the clock? How might someone who really knows the test realize to focus on those parts that moved you forward and ignore the parts that ate up the clock? What do they notice in the passage, for example, that helps them shave a few seconds off here and there? In SC, what 'split' most effectively eliminated the most answer choices?

It's also possible, in verbal, that simply: reading is taking too long. In which case, start reading a lot. It's a skill like any other.