Here are the resources I talk about:

Social Bro – I LOVE this tool for really diving deep into my Twitter Analytics to know who to engage with.  Plus you can pull in an account you want (people you want to model or competitors you want to study) and see all of their analytics!
Social Bro Training – This is how I learned how to use it.
Twubs – for connecting with people who use hashtags you like and participating in or running your own tweetchats.
Speaker Chat in Twubs – this is the example I gave.