instructions.markdown

1. Choose: Tools > New Plugin

2. Paste in the contents of "timestamp.py" below

3. Save as timestamp.py in ~/Library/Application Support/Sublime Text 2/Packages/User/ (should be the default directory that pops up when you save)

4. Choose: Sublime Text 2 > Preferences > Key Bindings - User

5. Add:

   { "keys": ["super+ctrl+t"], "command": "timestamp" }

To make command+ctrl+t perform the insertion.
Make sure to add a comma after the previous keymap entry, if present.

timestamp.py

import sublime, sublime_plugin
from datetime import datetime

class TimestampCommand(sublime_plugin.TextCommand):
  def run(self, edit):
    stamp = datetime.now().strftime("%Y-%m-%d %H:%M:%S ")
    for r in self.view.sel():
      if r.empty():
        self.view.insert (edit, r.a, stamp)
      else:
        self.view.replace(edit, r,   stamp)
~