I've been tagged...again

My writing partner in crime, Bronwyn Storm, has tagged me with the following question: "What is the most common grammar error you make?"

I'm hard pressed to pick just one so here goes:

1. Using commas where I should use semi colons and using too many of both.

2. Using the words 'then' and 'that' too often

3. Mixing up 'who's' and 'whose'

4. Run on sentences

5. Incomplete sentences

and I think I'll stop there =)

I'll tag Elle, Kristen & Anna