If you are facing following issue while starting tomcat:

SEVERE: StandardServer.await: create[localhost:8005]: 
java.net.BindException: Address already in use: JVM_Bind
    at java.net.TwoStacksPlainSocketImpl.socketBind(Native Method)
    at java.net.TwoStacksPlainSocketImpl.socketBind(TwoStacksPlainSocketImpl.java:137)
    at java.net.AbstractPlainSocketImpl.bind(AbstractPlainSocketImpl.java:376)
    at java.net.TwoStacksPlainSocketImpl.bind(TwoStacksPlainSocketImpl.java:110)
    at java.net.PlainSocketImpl.bind(PlainSocketImpl.java:190)
    at java.net.ServerSocket.bind(ServerSocket.java:376)
    at java.net.ServerSocket.<init>(ServerSocket.java:237)
    at org.apache.catalina.core.StandardServer.await(StandardServer.java:427)
    at org.apache.catalina.startup.Catalina.await(Catalina.java:777)
    at org.apache.catalina.startup.Catalina.start(Catalina.java:723)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:606)
    at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:321)
    at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:455)

It may be port which tomcat is using, is already being used by another process, or it might be tomcat is already running.

You can fix this problem by changing the port of tomcat in ..\tomcat\conf\server.xml

<Connector port="80" protocol="HTTP/1.1" connectionTimeout="20000" redirectPort="8443" />

to may be

<Connector port="8080" protocol="HTTP/1.1" connectionTimeout="20000" redirectPort="8443" />

Its standard practice to use port 8080 for development and port 80 for production.

Though right way would be to do analysis and find which process is using tomcat port and free it if its unwanted.