when cross selling consider your loyal customers who are more likely to purchase again build campaigns focusing on satisfied customers and promote additional products to them train associates to recognize satisfied customers and assess their needs 
on the other hand don t assume that customers are aware of your other offerings educate them and help them understand how those products can deliver value when speaking to a customer do so in a personable manner otherwise it comes across as a sales pitch lastly avoid unhappy customers as it can further the divide between them and your brand 