I mentioned this to a few folks and was asked to post this up as it helps to declutter teamspeak. When you sign in with all the defaults, you are subscribed to all of the channels and it's a pain to scroll down to the one specific channel you want to be in. This is what it looks like for me with default settings.
Open Settings, Options and look on the Application tab:
Note the button on the bottom I have a red arrow pointing to. Check this button instead of the default. After you click 'ok' go back to teamspeak and unsubscribe from any channel you are not interested in. You can see what you are subscribed to because the word cloud next to it will have a small white check mark in it if you are subscribed. Any channel you aren't interested in, right click on it and then left click on 'unsubscribe from channel and channel family.' It may be easier to unsubscribe from the private lobby, then go through and subscribe to only the channels you want to see. 6 or half dozen, there is more than one way to do it.
Now you need to make sure that only your channels are expanded when you start teamspeak. Go back to settings, options, and this time look on the Design tab. Make sure that 'Expand own channel on login' is selected like this:
Once you have subscribed to only the channels you want and collapsed all the channels you have unsubscribed to, your teamspeak client should be much easier to navigate when you start up. This is what mine looks like after I have made the configuration changes.
I hope you find this helpful. It saves me a few seconds and keeps things easy to find.