It’s hard for me to know which keyboard shortcuts are the best when using Adobe Premiere, as I’ve had very little experience in editing video with any type of software, let alone Adobe Premiere in particular.  Regardless, these are the shortcuts I feel could be useful and time-saving:

Go to Previous Edit Point – Up

Go to Next Edit Point – Down

Render Effects in Work Area – Return

Add Edit – Cmd+K

Snap – S

Mark In – I

Mark Out – O

Save – Cmd+S