The Ripple Delete option using Shift + Delete is very helpful when putting together a rough cut to remove chunks of footage without having to move proceeding footage around as it pulls everything in front of it backward to cover the area deleted.

I’ve found the use of the Arrow Keys andShift + Arrow Keys very helpful when fine tuning the positioning of a video clip or image in the preview monitor.

Control or Command + N is handy when a new sequence is needed quickly, usually if I want to experiment with an effect of clip layout without risking the original sequence.

Control or Command + U is helpful for saving edited clips in the timeline as separate clips to be used later on, as a way to save stages of edits in that particular part of a clip rather than hunting down for effects or part of a clip later.