OK folks!
In writing a note tonight I had to write a word I usually try and avoid. I avoid it because I always have issues spelling it. The word is "necessary", and all its forms. Very few words cause me to stumble like this one does, but it always makes me have to look up the spelling. Spelling annoys me. Proper grammar I can flubb through most of the time, but misspelling irritates me to see and frustrates me to see I've done myself.
So, I pose this: What word or words cause you issue, if any? Is it their placement that trips you up, or the spelling itself?