This tip is always voted as one of the favourites in my presentations and workshops. I'm sure you're going to love it too.
Problems:
1. Time spent writing out repetitive phrases and paragraphs in emails. For example paragraphs from your website or clauses in disclosure statements; an answer to the same question for the 100th time.
2. Remembering chains of numbers such as bank accounts, credit cards.
3. Being too time poor to thank people.