From AOL - six of the ten signs you're getting fired. Do any look familiar?
You're Losing Your Influence. It used to be no decision was made without your input. Now you're rarely consulted. Losing your voice in organizational matters is a signal that management is getting closer to running affairs without you.
You're Being Scrutinized More Closely. You feel as if you're not trusted. Your boss is putting new controls in place so that you no longer have the latitude to work independently, and you're getting subtle warnings that your work is not up up-to-snuff.
You've Had Frequent Run-ins With Your Boss. Though they claim it's not personal, it all comes down to relationships. Performance is a subjective judgment and managers are more likely to let go people they don't like. Eventually the clashes stop, and you'll find yourself ignored entirely.
New-Hires Are the Wave of the Future. New folks are being hired who can do no wrong with the higher ups, and who treat you veterans with disdain.
Rumors. You can't always trust the rumor-mill, but many times, where there's smoke, there's fire.
A Lot of Talk About "Transition." Your company is likely to merge, be acquired or "reorganize" and your company leader suddenly disappears.