This practice might just sound like "positive thinking," but it's a little more subtle and specific than that. 

Many of us hold back in one way or another from living our lives to the fullest.  Maybe we don't extend ourselves towards other people as much as we could.  Maybe we allow ourselves to get stuck in ruts which keep us from growing.  Maybe we settle for relationships of a lower quality than what we aspire to.  Maybe we neglect ourselves physically.  At the root of these behaviors are often decisions we made long ago in childhood – for instance, not to risk being hurt, or not to submit to authority figures by following their suggestions.  As adults, we know better, but because these decisions are still unconscious, they continue to exert an influence on our behavior choices. 

Developing a positive intention to give our best to life involves: (1) getting in touch with these negative, withholding, even masochistic attitudes, and (2) re-educating the little corners of our psyches which still cling to the childish logic which inspired them. 

It also works hand in hand with the process of visualizing ourselves free of our underdeveloped or negative aspects (see following practice), as we can go into meditation and build a "thought-form" of ourselves investing fully in our lives.  That energetic entity will then exert a subtle magnetic influence on our development, helping us to evolve towards it.