1. Don't tell me what I can afford. "Quality at a price you can afford. That's Room Sense". How do you know, you presumptuous ar*****e?
2. Don't sing to me. Why would some bunch of second rate session singers intoning a 3rd rate ditty make me want, among other things, a log cabin, high ABV rated cider, laxatives, a hearing test, a new car, a new kitchen? Generally, it has the opposite effect and I shun products whose ads annoy me.
3. Don't run the same ad on broadcast media any more often than hourly and preferably less often than that. Currently, I'm being driven insane by the NHS nursing recruitment ad running three or four times an hour on any commercial station I happen to tune to. It's probably made more aggravating by the voice-over's horrible accent.
4. Don't use meaningless phrases, e.g.: Nat West, "we are what we do". Eh? Whatever does that mean?
5. If the rules say you have to include all that waffle about terms and conditions; share prices can go down as well as up; please drink responsibly, etc, then please book more airtime instead of having your voice-over gabble 30 seconds' worth of words in 15 seconds.