I'm learning English. Unfortunately I have some obstacles in writing and speaking. In particular I often note that there are too many "of"-s in my sentences. For instance I want to get rid of them in the phrase "quality of this approach to the conundrum of enhancing my vocabulary" and I don't know if I can write "word memorization" instead of "memorization of the words". However "of" is a very common preposition and thus it's not a good keyword for googling.
Do you know any hints and grammar rules I can use for reconstruction of sentences to lower the usage of "of" or any links I can make a use of for finding this information or some good keywords for searching?