Lookout starts from the 12 o'clock - unless you're about to turn. Say you are going to turn right: look round to the right as far as you can, then scan up and down around the horizon all the way round as far as you can to the left, then back over the top to the right again. Then look ahead and select the turn attitude etc etc. Once settled in the turn, then revert to the "lookout -attitude - instruments" scan; looking as far round into the turn as you are able.