2 quick tips … on iCal
A really quick way to change the time of a meeting in iCal is to create it and then move the mouse close to the upper or lower edge of the event, so the mouse cursor turns into a double arrow.

Then just click and hold down the mouse button and move it up- or downwards to adjust the time.
In order to rearrange a meeting, just drag it around on your schedule. No need to adjust the details, just move your mouse over an event, click and hold and drag the event around. Release when it has reached the right position.
So, 2 quick and easy tips - exactlz what we like.