Type of Landing Pages: Subscription, long-copy, single-product, multi-product, lead-generation (A/B testing should be performed to test out different pages)
Landing Page Elements: Navigation, colors, buttons, images, trust symbols (Pro photos, great deign, guarantees, testimonials...), Forms (remove unnecessary fields, use CTA, make submission button stand out), Phone numbers
Conversion Rate Optimization:
Other optimization factors: (discounts, promotions, limited time sales, new products, shipping...