As I have already mentioned in many of my classes and in Writing Short Literature Essays, you want each paragraph of your essay to look forward.
Let’s try that again.
As mentioned in Writing Short Literature Essays, you want…
When referring to earlier points in your essay, you can almost always chop “I have already.” That saves three words and takes the focus away from the self, repetition and the gloomy past.
Another tip: move “I have already mentioned” or “As mentioned” to the second sentence position.
“As I have already mentioned in this essay, Slovenia is in Europe.” (Yawn.)
“Slovenia, as mentioned, is in Europe.”