3. Lazily using a comma between two sentences, instead of a full stop., 1. Writing 'a lot' as one word. 2. mixing up there, they're, their, 4. Missing apostrophes for possession (today's news) or omission (they're), 5. Small 'i' instead of 'I' AGGGGH. NOOOO. PLEASE...... DON'T. DO. THIS.