USE 'SCRAP TIME' EFFICIENTLY. Keep a file of simple portable tasks to do when you are waiting or travelling.
STAND WHEN TELEPHONING. Your calls will be less likely to turn into time-wasting chats.
BE TIDY. Never be tempted to postpone putting things away - searches for lost items eat up precious minutes and leave us stressed and less efficient. Put junk mail (unopened) into a special file. Open it only when you have nothing better left to do.
NEVER JUSTIFY (unless you have to). Avoid unnecessary explanations about why you want something done and keep requests and apologies as concise as etiquette allows.