The correct use of English is essential if you want to appear professional.

Here are a few commonly misspelled words and tips on how to remember the correct spelling:
stationEry – ‘e’ is for Envelopes
stationAry – ‘a’ as in stAtic
princiPAL – he is your PAL
principLE – this is a ruLE
Remember that automatic spelling correction will not pick up mistakes of this kind.