I got to lvl 50 in a week. But I'm no longer playing zzz.
Anyhow, it's really easy.
Always have
as many workers as you can but
don't forget the nesters! You need the nesters to produce workers, after all. xD Keep all of the worker eggs for future use and some soldiers and nesters.
K, now for the tips.
1) To reduce lag and maximise efficiency.
BLOCK YOUR STORAGES.This means surrounding your storages with decorations so your P3s cannot access them so it restricts their movements and they won't move as much to the storages. I don't think it influences the speed your P3s harvest but it definitely reduces the lag and makes them easier to organise. Well, that's what most guides suggest.
But personally I choose to block my P3s movements instead. (ie I surround my resource tiles with storages and place my P3 smack in the middle so that the P3 stays in the exact same spot and continuously harvests.
If this is too hard for you to understand, basically just make your p3s move as little as possible. If you still can't figure out how to. Just place your storages as close to your p3s as possible.
I may do a more comprehensive guide later if anybody wants one.
2)
Upgrades are important. Upgrade your storages & houses as soon as you can. Esp storages since resources come flowing in really fast at higher levels. And you'll realise you won't have much space for houses at later levels due to the need for storages so UPGRADE your houses. At max upgrade I think the houses can house up to 7 P3s!!!

3) If you want to lvl up fast, Leave habi on overnight.
I only did this at around lvl 35+. I would have achieved 50 faster if I had done so right from the start. But seriously, leaving it on overnight gives me 2 lvls @ around level 35. And at around 45+ around 1 lvl.
That's all I have for you.
Maybe I should make a guide. I need rep.
Edited by 2NE1, 03 September 2011 - 06:18 PM.