Looks like a lot of consensus on :-
1) Not enough workers (although I often find I am putting workers to sleep before railroad and RP - I think that puts me off)
2) Overbuilding. I STILL do this - I can't remember ever entering the latter stages without bank, lib, uni and powered factory in every city apart from the GPF (and I am just about working out how to set this up). I know it's wrong, but I still do it...
3) Too little defence. Because I am overbuilding....
However, I can add:-
4) Completely ignoring naval until I have steel and combusion, other than caravels for exploration and great merchants. The mid game ships just seem so rubbish I put them off...then have no response when a stack of ten galleons hit me.
5) building sub-optimal cities just to block my neighbour's expansion. Sometimes this makes sense (eg at a pinch point on the map) but usually it's vanity - this is MY land! I now realise it's better to found in the right place, let the AI settle if he wishes then take those cities by force later on.
6) procrastinating on a DoW because it will be so much easier with the next tech up the tree...ignoring that during the delay, the AI is also advancing.
7) Ignoring spies. I often go many games without building one. Then I try it...and see the benefits...but somehow it slips off my radar.
8) Failing to use specialists properly. Although I had some great responses to a request for help on this last week, so I am trying to improve
![good job :goodjob: :goodjob:](/images/smilies/goodwork.gif)