GMAT Verbal & Essays

For those of you who have taken the test
1) Does it pay to 50 most common memorize the parallelism/comparison markers so that they are visible right away when reading an SC question?
2) If yes, then does such a list exist on the web?
Thanks.

I am not completetly familiar with the 50 markers but I think it is very important to recognize that if you have "and" or "or" in a sentence then there may be a parallel issue and whenever a comparison is being made that is also a parallelism issue. When any of these three scenarios happen I check the elements in the sentence for parallelism.