What is the word for someone who wants to get the most out of his life?

Solution 1:

"lust for life" defines a strong desire to live a full and rich life.

• "She had a lust for life like no one I have ever met."

A person who has a lust for life usually has a vitalizing energy, radiates joie de vivre and enjoys life fully.

Solution 2:

How about ambitious go-getter

Merriam Webster defines ambitious as follows:

1.  having or controlled by ambition; having a desire to be successful, powerful, or famous
2.  having a desire to achieve a particular goal

Example:  an ambitious young executive

The same dictionary, i.e. M.W. define go-getter as follows:

an aggressively enterprising person

Merriam Webster, once again, defines enterprising as follows:

marked by an independent energetic spirit and by readiness to act

Example:  an enterprising young reporter

Based on all of the information furnished, if you find the suggested phrase of interest, then you could rewrite the sentence as follows:

As an ambitious go-getter, I want this and that, because I will lose less time and it would increase my chances of success.

Solution 3:

Henry David Thoreau coined the phrase "living deliberately", as a descriptor for one who tries to be conscious at all times and avoid living passively.

“I went to the woods because I wished to live deliberately, to front only the essential facts of life, and see if I could not learn what it had to teach, and not, when I came to die, discover that I had not lived.”

Solution 4:

bon vivant

noun

person who enjoys the good things in life, especially good food and drink; a man about town.

en.wiktionary.org