Choose and promote products to offer to your customer as upselling before paying the order.
You can encourage customers to purchase a product/service with a special offer just when they are more inclined to complete their purchase.
You will increase the conversions of the discounted product (based on studies, 30% of customers takes advantage of the offer) and global sales on your store.

WordPress Download Manager Pro
Advanced Custom Fields for WooCommerce
Multiple Addresses for WooCommerce Pro By ThemeHigh
MyThemeShop WP Quiz Pro
Social Auto Poster
CobaltApps Themer Pro Plugin
WP Crowdfunding Pro + Theme 
