I like these scriptures because they invite us to be better with no sense of negativity. There’s nothing wrong with being blessed–it’s a good thing. This does not mean, however, that we should be content with good; there’s often still so much more. The comparison of Blessed and More Blessed shows us that there is often progress yet to me made without belittling our current position and efforts.

13 And now, because ye are compelled to be humble blessed are ye; for a man sometimes, if he is compelled to be humble, seeketh repentance; and now surely, whosoever repenteth shall find mercy; and he that findeth mercy and endureth to the end the same shall be saved.
14 And now, as I said unto you, that because ye were compelled to be humble ye were blessed, do ye not suppose that they are more blessed who truly humble themselves because of the word?
15 Yea, he that truly humbleth himself, and repenteth of his sins, and endureth to the end, the same shall be blessed–yea, much more blessed than they who are compelled to be humble because of their exceeding poverty.
(Book of Mormon | Alma 32:13 – 15)

1 AND it came to pass that when Jesus had spoken these words unto Nephi, and to those who had been called, (now the number of them who had been called, and received power and authority to baptize, was twelve) and behold, he stretched forth his hand unto the multitude, and cried unto them, saying: Blessed are ye if ye shall give heed unto the words of these twelve whom I have chosen from among you to minister unto you, and to be your servants; and unto them I have given power that they may baptize you with water; and after that ye are baptized with water, behold, I will baptize you with fire and with the Holy Ghost; therefore blessed are ye if ye shall believe in me and be baptized, after that ye have seen me and know that I am.
2 And again, more blessed are they who shall believe in your words because that ye shall testify that ye have seen me, and that ye know that I am. …
(Book of Mormon | 3 Nephi 12:1 – 2)

1 AND it came to pass when Jesus had said these words, he spake unto his disciples, one by one, saying unto them: What is it that ye desire of me, after that I am gone to the Father?
2 And they all spake, save it were three, saying: We desire that after we have lived unto the age of man, that our ministry, wherein thou hast called us, may have an end, that we may speedily come unto thee in thy kingdom.
3 And he said unto them: Blessed are ye because ye desired this thing of me; therefore, after that ye are seventy and two years old ye shall come unto me in my kingdom; and with me ye shall find rest.
4 And when he had spoken unto them, he turned himself unto the three, and said unto them: What will ye that I should do unto you, when I am gone unto the Father?
5 And they sorrowed in their hearts, for they durst not speak unto him the thing which they desired.
6 And he said unto them: Behold, I know your thoughts, and ye have desired the thing which John, my beloved, who was with me in my ministry, before that I was lifted up by the Jews, desired of me.
7 Therefore, more blessed are ye, for ye shall never taste of death; but ye shall live to behold all the doings of the Father unto the children of men, even until all things shall be fulfilled according to the will of the Father, when I shall come in my glory with the powers of heaven.
(Book of Mormon | 3 Nephi 28:1 – 7)

4 And blessed are you because you have believed;
5 And more blessed are you because you are called of me to preach my gospel–
6 To lift up your voice as with the sound of a trump, both long and loud, and cry repentance unto a crooked and perverse generation, preparing the way of the Lord for his second coming.
(Doctrine and Covenants | Section 34:4 – 6)

Update: in the October 2007 General Conference Elder Oaks gave a talk “Good, Better, Best” on this very subject. He says in part:

We should begin by recognizing the reality that just because something is good is not a sufficient reason for doing it. The number of good things we can do far exceeds the time available to accomplish them. Some things are better than good, and these are the things that should command priority attention in our lives….

Consider how we use our time in the choices we make in viewing television, playing video games, surfing the Internet, or reading books or magazines. Of course it is good to view wholesome entertainment or to obtain interesting information. But not everything of that sort is worth the portion of our life we give to obtain it. Some things are better, and others are best.