What exactly is man's purpose here on earth? Here is what the bible says that we should be doing "at all times", "continually", and "always". That doesn't leave a whole lot of time left over. (and when I say man I am speaking as in mankind or men and women)

Psalm 34:1-4
1 I will bless the LORD at all times; His praise shall continually be in my mouth. 2 My soul shall make its boast in the LORD; the humble shall hear it and rejoice. 3 O magnify the LORD with me, and let us exalt His name together. 4 I sought the LORD, and He answered me, and delivered me from all my fears.

Psalm 62:8
Trust in Him at all times, O people; pour out your heart before Him; God is a refuge for us. Selah.

Luke 18:1
Now He was telling them a parable to show that at all times they ought to pray and not to lose heart,

Luke 21:36
"But keep on the alert at all times, praying in order that you may have strength to escape all these things that are about to take place, and to stand before the Son of Man."

Ephesians 6:18
With all prayer and petition pray at all times in the Spirit, and with this in view, be on the alert with all perseverance and petition for all the saints,

Deuteronomy 14:23
"And you shall eat in the presence of the LORD your God, at the place where He chooses to establish His name, the tithe of your grain, your new wine, your oil, and the first-born of your herd and your flock, in order that you may learn to fear the LORD your God always.

Deuteronomy 19:9
if you carefully observe all this commandment, which I command you today, to love the LORD your God, and to walk in His ways always-- then you shall add three more cities for yourself, besides these three.

Proverbs 23:17
Do not let your heart envy sinners, but live in the fear of the LORD always.

Proverbs 28:14
How blessed is the man who fears always, but he who hardens his heart will fall into calamity.

1 Corinthians 15:58
Therefore, my beloved brethren, be steadfast, immovable, always abounding in the work of the Lord, knowing that your toil is not in vain in the Lord.

Ephesians 5:18-20
18 And do not get drunk with wine, for that is dissipation, but be filled with the Spirit, 19 speaking to one another in psalms and hymns and spiritual songs, singing and making melody with your heart to the Lord; 20 always giving thanks for all things in the name of our Lord Jesus Christ to God, even the Father;

Philippians 4:4
Rejoice in the Lord always; again I will say, rejoice!

1 Thessalonians 5:16-18
16 Rejoice always; 17 pray without ceasing; 18 in everything give thanks; for this is God's will for you in Christ Jesus.

1 Chronicles 16:11
Seek the LORD and His strength; seek His face continually.

Psalm 35:27-28
27 Let them shout for joy and rejoice, who favor my vindication; and let them say continually, "The LORD be magnified, who delights in the prosperity of His servant." 28 And my tongue shall declare Thy righteousness and Thy praise all day long.

Psalm 70:4
Let all who seek Thee rejoice and be glad in Thee; and let those who love Thy salvation say continually, "Let God be magnified."

Psalm 71:14-15
14 But as for me, I will hope continually, and will praise Thee yet more and more. 15 My mouth shall tell of Thy righteousness, and of Thy salvation all day long; for I do not know the sum of them.

Psalm 105:4
Seek the LORD and His strength; seek His face continually.

Isaiah 51:13
That you have forgotten the LORD your maker, who stretched out the heavens, and laid the foundations of the earth; that you fear continually all day long because of the fury of the oppressor, as he makes ready to destroy? But where is the fury of the oppressor?

Isaiah 58:11
"And the LORD will continually guide you, and satisfy your desire in scorched places, and give strength to your bones; and you will be like a watered garden, and like a spring of water whose waters do not fail.

Hosea 12:6
Therefore, return to your God, observe kindness and justice, and wait for your God continually.

Hebrews 13:15
Through Him then, let us continually offer up a sacrifice of praise to God, that is, the fruit of lips that give thanks to His name.