Zooming
Press cmd+opt+right-drag to marquee zoom.1
Use = and - to zoom in horizontally.
Use PgUp and PgDn to zoom in vertically.
` to make tracks as small as possible. Shift+` to make tracks as big as possible. Using opt+up/down Scrolling is helpful with this.
Ctrl+PgDn to zoom out entire project.
Shift+- to zoom in to selected item.2
More zoom settings can be found here.