Here are a few to get you started. I'll post more when I have time.
# Shortcut #1 - {TAB} key
Press the {TAB} key to toggle Premiere's palettes off and on. With the palettes turned off you will have more room on the screen to expand your Project window, Monitor window, and Timeline window. This will also give you an unobstructed view of the Audio Clip window when working with audio wave forms.
# Shortcut #2 - { + } and { - }
The plus key { + } and minus key { - } on the main keyboard (NOT the numeric keypad) will expand and contract the time scale in the Timeline window. HINT: Position the Edit Line before you press plus or minus to keep the clip centered in the Timeline window.
# Shortcut #3 - { \ }
Use the backslash key { \ } to automatically re-size the Timeline window so that you can see all the clips in your edited program.
# Shortcut #4 - { Space Bar }
The { Space Bar } is the largest key on your keyboard. Use it to start and stop playback in the Timeline window, Monitor window or Clip window. In the Timeline window, pressing the { Space Bar } starts playback from the location of the Edit Line. Playback will continue until you press the { Space Bar } again, or the end of the project is reached.
# Shortcut #5 - { Enter }
Press the { Enter } key to playback ONLY the section of the Timeline defined by the yellow Work Area Bar. If there are any video segments or audio segments that require preview files, these will be rendered before playback commences. Playback will automatically stop at the end of the yellow Work Area Bar.
# Shortcut #6 - { Alt } + { Click Yellow Bar }
Hold down the { Alt } key while you click the yellow Work Area Bar. This will automatically expand the yellow Work Area Bar to cover all the clips in the Timeline window. NOTE: If there is a gap anywhere in the Timeline -- even as small as 1 frame -- the yellow Work Area Bar will STOP at the gap. This is an excellent way to troubleshoot your program and check for any accidental gaps in your Timeline. HINT: If you simply double-click on the yellow Work Area Bar, it will be automatically sized to fill the current viewing area of the Timeline window.
# Shortcut #7 - { Alt } + { period } and { Alt } + { comma }
When a clip in the Timeline window is selected (i.e. surrounded by the animated marquee), you can nudge it forwards or backwards one frame at a time by holding the { Alt } key while pressing the { period } or { comma } respectively. If you hold down both the { Alt } key and the { Shift } key, you can nudge the selected clip 5 frames forward at a time with the { period } and 5 frames backward at a time with the {comma}.
# Shortcut #8 - { V } and { Z }
The letter { V } selects the default Selection Tool and the letter { Z } selects the Zoom Tool. With the Zoom Tool { Z } selected, click and drag inside the Timeline area to specify exactly what clips you want to fit into the Timeline window. Then press the letter { V } to return to the default Selection Tool. Once you start using this technique you will really appreciate how easy it is to get just what you want to see in the Timeline window. Just remember, it's eazy with V and Z.
# Shortcut # 9 - { Home } and { End }
When any clip in the Timeline window is selected (i.e. surrounded by the animated marquee), pressing the { Home } key places the Edit Line at the start of the clip and pressing the { End } key places the Edit Line at the end of the clip.
# Shortcut # 10 - { * } on Numeric Keypad
When working in the Timeline window or Monitor window, pressing the asterisk key { * } on the Numeric Keypad will create a Marker in the Timeline window. These markers are extremely useful when combined with Premiere's new Automate to Timeline function. HINT: Press { Shift } + { W } to move forwards from one Timeline marker to the next. Press { Shift } + { Q } to move backwards from one Timeline marker to the previous one.
# Shortcut # 11 - { uparrow } or { downarrow }
When you are on the timeline, hitting the up arrow and down arrow will bring you to the first frame and last frame of your project.
# Shortcut # 12 - { shift } & { ctrl } & either { rightarrow } or { leftarrow }
If you select 'shift'-'ctrl' and either the left arrow or right arrow while on the timeline you will jump to the next juncture between clips to the right or left depending on which arrow key you used. Its a quick way of jumping through the transitions between clips on your timeline..