In summary then...
Make sure it'll look great on mobile
Keep it to 6 sections
Do not send it as a PDF
Put a cover on if it looks nice
Call your pricing page 'Investment'
Use Instant Payments in Better Proposals
Don't give your clients choices like upsells
Send your proposal within 24 hours
Doesn't matter what day you send but Monday is slightly better
Include video if you need to.
Use Live Chat integrations within Better Proposals
Ensure your proposal URL is branded
Integrate your CRM with Better Proposals