Lanny,
(0) You likely have already done this, but verify that you have plenty of free space in your startup disk. If not, Increase disk space.
Also, if you did not use Lion Recovery's Disk Utility to repair your startup disk after your forced shutdown, you may want to consider doing so.
(1) Next, check for "hanging" apps. Here is how I do it:
Quit all apps. Then user Mac's > Force Quit ... menu command to see if anything other than Finder is still running.
On my 10.7.3 Macs, (and on those of some friends with whom I have checked,) Preview, TextEdit, and a few (but not all) other Apple apps can still be running even though the Dock does not show them as launched.
I double click on those "hanging" apps in the Force Quit ... window to make them appear in the Menu Bar. I then manually quit them from the menu bar or Dock. After eliminating the "hangers", my Mac quits faster than if I do not do really quit those apps..
(2) If startup time is also taking longer, I use Lion Recovery's Disk Utility to restore from my latest Time Machine backup.
A full restore (and the subsequent indexing and new TM full backup) takes a long time, so I wait as long as I can tolerate before undertaking this process. However, my Macs shut down and start up much faster after the restore, indexing, and new backups have finished.
Message was edited by: EZ Jim
Mac Pro Quad Core (Early09) 2.93Ghz OSX 10.7.3 24" LED Cinema Display
MBP 15" i7 (Early'11) OSX 10.7.3 External iSights
13" MBP (Mid'09) 2.26GHz OSX 10.7.3 iBook SE 366MHz OSX 10.3.9