$($revise any $4$ to show a you$-$attitude$)$:

$1.$ We want to get rid of all our $15-$inch LCD screens to make room in our warehouse for the new $19-,23-,$ and $35-$inch monitors. Thus, we are offering a $25$ percent discount on all sales of $15-$inch monitors this week. $[$Revise to focus on the customer's needs$/$concerns$,$ not the seller's$]$

$2.$ I know I$\text{'}$m late with the asset valuation report, but I haven't been feeling well and I just haven't had the energy needed to work through the numbers yet. $[$Revise to focus only on what the person waiting for the report needs to know.$]$

$3.$ Your email order cannot be processed by our system because no one is monitoring this account; we request that you use the order form on our website instead. $[$Revise to focus on only what the customer needs to know$/$do$--$less $"$we$"$ and more "you."$]$

$4.$ If you cared about doing a good job, you would've made the extra effort required to learn how to use the machinery properly. $[$Revise to focus on what the employee needs to know to be successful moving forward, not on how the employer feels about the error that has been made.$]$

$5.$ Regarding your email from September $28$ regarding the slow payment of your invoice, it's important for you to realize that we've just undergone a massive upgrade of our accounts payable system and payments have been delayed for everybody, not just you. $[$Revise to focus on only what the recipient needs to know.$]$