Welcome davidmc36 !
Just to echo what Rileybaxter had said ..... the database here at Radio Reference can be great for finding frequencies specific to the state / county you live in. ( Second tab in from the main links found at the top of Radio Reference. ) And you may also have seen from the main Forums page that there is a subforum for each state. It could be good to look through the forum for the state you live in for any information related to what you may want to find out about frequencies in your state.
Also ..... while I am all for anyone making a thread to ask a question about their scanner / frequencies / etc.. ..... the search feature at Radio Reference can be a very good start in finding out specific information you may be wondering about. For instance you could go into the state forum for where you live and do a thread search for " X county " ( where ' X ' would be the county in the state you live in. ) Doing that could bring up information you'd want to know about without having to search page-by-page through a state forum orany forum here at Radio Reference.
And yep ..... just as Rileybaxter had said .....the Wiki ( 4th tab in from the main links at the top of the Radio Reference site ) can be bring up some very useful information as well. I'm not sure of any tips or tricks to scanning ...... if there are I'd like to know them as well myself.

But maybe asking a more specific question could bring about more replies than a general overall question. Maybe something like " what are some good tips for getting better frequency reception on my Pro 95 scanner when scanning in my county of ' X ' in the state of ' XX ? '
I know since I have been a member here I have several times gotten some very useful information and help / advise from fellow members ...... Many very knowledgeable people here on all aspects of scanning.
Ganuke