What I've found after many years is this: If you have something negative to say, and don't have any idea what would be better, then just shut up. If you see an

What I've found after many years is this: If you have something negative to say, and don't have any idea what would be better, then just shut up. If you see an ugly flower, do you rip it up and leave nothing in it's place? If something sucks and you don't have any idea how it could be better, keep your mouth shut. If you have a better idea, then tell the person straightforward - I think this could be better like this, that could be better like that, then let the person take what he wants of your suggestions. Don't defend your points, don't argue it. Just give your opinion and leave. If your opinion is strong, and this particular part of the item affects you DIRECTLY, then first of all make it clear that you would like to argue a point, then make sure that the other person understands that this is not personal. Then lay out the points you dislike with suggestions on how they would be better, and then try to come to a middle ground on which items should go your way and which items should go the other way. Keep the primary rule in mind - finding an error and pointing it out does not show you are clever. If the thing you see is not relevant to you and you cannot play any difference in getting it fixed, then don't say anything. Just let it be.