Professional Appearance: Use clean, organized layouts with clear hierarchy Brand Consistency: Include company logo and colors matching your branding Clear Information Flow: Arrange information logically for easy scanning Adequate Spacing: Don't overcrowd content; use whitespace effectively Readable Typography: Use standard fonts and appropriate sizes Print-Friendly Design: Test template in print preview; avoid light colors that don't print Mobile Responsive: Consider how template appears on different screen sizes Placeholder Verification: Ensure all required placeholders are present Dynamic Content Testing: Preview with varying invoice amounts, long names, etc. Legal Compliance: Include required information like payment terms, VAT/tax ID