Useful Hot/Quick Keys for After fx 6.5
The best way to work in Adobe After Effects is with a fluid like navigation through you timeline and layers. To achieve this you will need to know some helpful Hot/Quick Keys. Here are some that I use probably use every time I open the After Effects:

First off there is Duplicating a layer which is Control + D but if you want to split the layer at your time marker's current frame Control + Shift + D. When I found the split layers shortcut I could stop smiling for weeks.
Push the Home Key and it will take you to the beginning of you timeline. Push the End key and your time marker will be sent to the end of the time line.
I and O, push the I key and the time marker will go to the In of your selected layer and if you press the O key it will take you to the end of that layer.
If you hold the Control Key and push the up or down arrow keys you can navigate through your layers.
Page up and Page down will move the time marker one frame at time forward or backward.
