But if you are looking for tips, first, use your computer's spell check program. It will eliminate 90% or more, of spelling errors. It will not catch homonyms or wrongly placed apostrophes, which is why the second tip, is to get someone who does read, write, and speak English as a first language, to proofread your work. They can clean up minor grammatical errors for you.
You should be able to set your spell checker to either American English, or British/Australian English. They are pretty much the same, but there are some differences in spellings: American English - favorite; color. British/Australian English - favourite; colour.