[RedDevil]

One note about the tip to park so that you do not have to reverse out:

This depends on the space available and the parking skill of the driver.
At my office the parking lot has really narrow slots. We wriggle past each others mirrors and doors just to get in and out.
Reversing into those spots is quite difficult, while driving straight in is dead easy.
Reversing out of a tight spot is not difficult at all.

So while the engine wastes triple the fuel per second while cold, it is still better to park straight in and reverse it out if the time to do so is less than a third of the time needed to reverse in.

So this rule had better be refrased to 'Reverse in IF you can do so easily'.