Make an intellectual connection
1. Have structure and logic to what you want to say, rather than being all over the place. Point 1. Point 2. Point 3.
2. Be prepared and answer rebuttals up front. You can introduce it as 'I know what you're thinking'.
3. When convincing to make a change, introduce it by setting the scene, painting a picture. For example, in convincing a client to shift to cloud based accounting, introduce it as 'It's 4:30 in the afternoon. You're on the pool deck of a cruise boat. Relaxing with a mojito. You've just finished your monthly reconciliation on your iPad, a job that took you 10 minutes instead of the two hours previously. The accounts are all in order, you're free to go.
Make an Emotional Connection
4. Restructure from 'I, we, us' to a 'you' perspective. No: Our firm is a good place to work. Yes: You'll enjoy working here. No: Here are the papers Yes: Here are your papers.
5. Use stories to make your point.
6. Great stories have three elements: characters, dialogue and told in a way to grab attention up front. This means you can start in the middle or the end, then backtrack to the beginning.