There are parents, siblings, ...

There are parents, siblings, teachers and friends, but counting on them to motivate you isn't fair. They've all got their own lives, and while the may be able to help you out, if you can motivate yourself, then you're golden.
 Shannon Miller

Quotes from the same author

You have to remember that no matter how big your goals or how many you have, there are going to be times when you miss by a little bit. You have to be realistic and flexible. One reason I have so many smaller goals is that even if my big goals don't happen, I've still achieved so much along the way, I don't feel the loss.
 Shannon Miller
I can now successfully drive a stick. That's a huge accomplishment.
 Shannon Miller
There is always going to be a reason why you can't do something; your job is to constantly look for the reasons why you can achieve your dreams.
 Shannon Miller
Face each day with the expectation of achieving good, rather than the dread of falling short.
 Shannon Miller