Software Engineering is the art of showing your boss how to do something the right way, without making his idea seem stupid.
Ego's are very real. Step on one, and even if you're right, you're probably not going to get anywhere with that person. Most of my proposals now consist of:
While we could do it that way, this way would give us these additional benefits:
* nicely enumerated list of benefits,
* most important ones at the top,
* since people tend to ignore bullet points near the middle and bottom
But some things, no matter how compelling an argument you make, will always go ignored. Such as recommending against using an AJAX-enabled web application to do the work of a heavy-duty forms application.