I know ESR isn't really popular here, but: "Being a native English-speaker does not guarantee that you have language skills good enough to function as a hacker. If your writing is semi-literate, ungrammatical, and riddled with misspellings, many hackers (including myself) will tend to ignore you. While sloppy writing does not invariably mean sloppy thinking, we've generally found the correlation to be strong and we h…
Excellent advice.
Ayn Rand wrote: "If you don't know, the thing to do is not to get scared, but to learn."