similar to visual studio, a few gems here.
CTRL-SHIFT-F2 -- Clear all bookmarks.
CTRL+F2 -- toggle bookmark.
F2 -- Move to next bookmark.
SHIFT+F2 -- Move to previous bookmark.
ALT+BREAK -- Cancel a query.
CTRL+O -- Connect.
CTRL+F4 -- Disconnect.
CTRL+F4 -- Disconnect and close child window.
ALT+F1 -- Database object information.
CTRL+SHIFT+DEL -- Clear the active Editor pane.
CTRL+SHIFT+C -- Comment out code.
CTRL+C or Ctrl+Insert -- Copy
CTRL+X or Shift+Del -- Cut
SHIFT+TAB -- Decrease indent.
CTRL+DEL -- Delete through the end of a line.
CTRL+F -- Find.
CTRL+G -- Go to a line number.
TAB -- Increase indent.
CTRL+SHIFT+L -- Make selection lowercase.
CTRL+SHIFT+U -- Make selection uppercase.
CTRL+V or Shift+Insert -- Paste.
CTRL+SHIFT+R -- Remove comments.
F3 -- Repeat last search or find next.
CTRL+H -- Replace.
CTRL+A -- Select all.
CTRL+Z -- Undo.
F5 or Ctrl + E -- Execute a query.
F1 -- Help for Query Analyzer.
SHIFT+F1 -- Help for the selected keyword.
F6 -- Switch between query and result panes.
Shift+F6 -- Switch panes.
CTRL+W -- Window Selector.
CTRL+N -- New Query window.
F8 -- Object Browser (show/hide).
F4 -- Object Search.
CTRL+F5 -- Parse the query and check syntax.
CTRL+P -- Print
CTRL+D -- Display results in grid format.
CTRL+T -- Display results in text format.
CTRL+B -- Move the splitter.
CTRL+SHIFT+F -- Save results to file.
CTRL+R -- Show Results pane (toggle).
CTRL+S -- Save
CTRL+SHIFT+INSERT -- Insert a template.
CTRL+SHIFT+M -- Replace template parameters.
CTRL+L -- Display estimated execution plan.
CTRL+K -- Display execution plan (toggle ON/OFF).
CTRL+I -- Index Tuning Wizard.
CTRL+SHIFT+S -- Show client statistics
CTRL+SHIFT+T -- Show server trace.
CTRL+U -- Use database