There is great power in united prayer.
Matthew 18:19-20
Acts 1:13-14
Acts 4:23-31
Acts 12:12

Sometimes it's best to pray in private.
Matthew 6:6
Mark 1:35
Mark 6:46
Luke 5:16

Sometimes it's necessary to "watch" in prayer.
Matthew 26:40-41
Luke 6:12
Acts 12:5
Ephesians 6:18

Cultivate the habit of praying always, about everything.
1 Chronicles 16:11
Proverbs 3:6
Luke 18:1
1 Thessalonians 5:17

Fervent, wholehearted prayer gets optimum results.
Jeremiah 29:13
Lamentations 2:19
Luke 22:44
Hebrews 4:16
James 5:16b

Be persistent.
Genesis 18:23-32
Genesis 32:24-28
Luke 11:5-10
Luke 18:1-8a
Ephesians 6:18

Challenge God to keep His word and answer prayer.
2 Kings 2:14
Isaiah 45:11b