I think good grammar is important and attractive! As a VA, it is part of my job to notice grammar, spelling and the proper use of words. Common mistakes can do serious damage to an otherwise stellar reputation. Think about the image you project and proofread, do some research, look it up…or ask me!
Stationary and Stationery
Stationary and stationery are confused probably more by their similar spellings than by their definitions, which are quite different. The one-letter spelling difference in these two words makes them easy to confuse.
Stationary with an “a” means “not moving”: The dog lay stationary in the hot sun.
Stationery (with an “e”) refers to writing materials, usually paper.
A good way to remember the difference between the two is by associating the “e” in stationery with envelopes, because envelopes are often used with writing materials.
Source: www.grammarerrors.com