Tip: TextMate file navigation
When you are not sure which project file you are looking for and want to browse them from the keyboard use ctrl-tab to switch to the Project Drawer. The up and down arrows move the selection up and down in the drawer. The right arrow expands folders. The left arrow collapses folders when a folder is selected and moves the selection to the parent folder when a file is selected. Return opens a selected file in the editor window. Space allows the selected file or folder name to be changed. Once you are finished with the Project Drawer ctrl-tab will switch focus back to the editor window.
(via CommonThread - Home)
