Mispeling...
Misspelling is a major problem. It makes one look really bad when they can't even spell correctly on a computer with a dictionary of hundreds of thousands of words. If you don't have an electronic dictionary then you need one. You can get one at most retail computer stores for $10 or $15. I suggest Microsoft Bookshelf. It is an entire reference library on CD. It can usually be found for between $40 to $50. It, also, has a yearly subscription option for $29, which upgrades you to the newest version yearly.