If there are apps that you’d like to have open when you start your Mac, you can set this up in System Preferences. Go to Users, make sure your user account is highlighted, then click Login Items. Then, click the + and you can choose an application, file server, or anything else you want to open when you turn on your Mac. Once you add something, use the checkboxes to opt to hide it—though it will still run in the background.
One caution though: having too many programs running when starting your Mac can really slow it down. If you need to speed things up and temporarily don’t need them running, hold Shift while OS X or macOS is logging in and it will suppress them.