You can have a loss of power, abnormal oil consumption, excessive carboning in the exhaust.
The PCV valve is just pushed into it's grommet on the valve cover. Generally, if you pull it out and shake it, you can hear the check rattling freely. Most of the time, if it's not free, you can clean it out by spraying carb cleaner into it and clearing out the old gunk.
Ehow has a fairly simple procedure for flushing the power steering, but it's pretty much draining the reservoir and refilling.
How to Flush Power Steering Fluid | eHow.com