44,000 People
To attract a LOT of people, fill one half of your tower with restaurants and the other with offices. It's expensive, but worth it in the long run.
Submitted by [email protected]

Auto Buldoze
When you lay out a new unit, press shift and you don't have to bulldoze first.
Submitted by goku ([email protected])

Easy Money
For extra money, start a new game and place a lobby in the lower left corner (underground.) You must do this before doing anything else.

When a condo goes for sale, lower the price to $40,000 then raise it to $200,000. In this manner you'll earn $50,000 more than the average price.
Submitted by Coert Williams ([email protected])

Game Tips
The metro station requires a subway tunnel running the entire length of the landform on B10. If you build anything on B10 except the Metro Station, you will not be able to place it. Even if you bulldoze things that were placed on B-10, the floor section will remain, and even the smallest floor section will block the Metro tunnel. The only exception to this is the "lots of money" cheat and the elevator mechanisms that "hang down" from elevators which terminate on floor B9.

Contrary to the manual, you do not have to bring all service elevators to the recycling center. It would be impossible since service elevators can only go 30 floors. But do have at least one service elevator going there.

Just like real-life towers in real cities, you'll find that stores, theatres and other commercial establishments usually do well in the basement. But they also bring in a lot of traffic from outside. In order to keep your "permanent" population upstairs happy, you may need to have elevator service that services only the basement levels and the floor 1 lobby.

If you build a regular elevator that passes through a recycling center, you may occasionally see people get on and off in mid-air on the upper floor of the recycling center.

One successful strategy is to keep offices and condos totally separated by building entire floors of offices and entire floors of condos. You might want to mix fast food joints with offices on the floor just above each lobby and put all your stores, movie theatres, etc. in the basement levels.

How can you tell if SimCitizens are waiting to go up or down an elevator? Remember the mneumonic LARD. People waiting to the -L-eft of the elevator are -A-scending, while those waiting to the -R-ight of the shaft are -D-escending.
Submitted by ALCOL ([email protected])

Maintenance
When a condo will not sell because "conditions are terrible", set the price to the lowest possible, and then set it to the price you want.
Submitted by Thomas Florence ([email protected])

Playing Tip
Build a lobby anywhere, then dig an elevator to the third-level basement. Place two restaurants side by side on the third-level basement and you'll soon have $200,000!
Submitted by Zack Ryland ([email protected])

Three-Story Lobby
For a three-story lobby, hold Ctrl and Shift while placing a ground floor lobby. You may need to drag the cursor upward while placing your lobby.
 

Two-Story Lobby
For a two-story lobby, hold CTRL while placing a ground floor lobby. You may need to drag the cursor upward while placing your lobby.