It all depends on starting location, techs, and whether I have a scout....
HOWEVER, if I have seafood I build a workboat. Those tiles are too important to early growth and research to pass up.
My records show that two scouts are worthwhile on HUGE/Marathon. If I can't get them at the start or pop them, I build them before I build another city.
If my city is in the middle of a forrest, Maybe I'll time my worker with bronze working... In any case I try not to build a worker before he has something to do. To tinker with the timing, I may throw a barracks in the que , just to keep my city busy while I'm researching or growing and then pre-empt it with a worker or something else...
Of course if I get a forrest start, I'll probably try to chop an early wonder.
I like to get to size 3 or 4 before building a settler. Then he usually settles near metal, or horsess, dpending on the start.
After that, I might decide I prefer my neighbors capital to the next best city location near my own capital, and build an army to go get it.