How do you pray?

Prayer is like a personal phone call to God, so obviously conversations with Him will vary from person to person. Yet within these prayerful conversations, there are often similarities in style. There are those who pray classical prayers, such as the Hail Mary, and those who make up their prayers as they go along. Personally, I like to combine both methods. I'll review the day with God, then close my prayer with a handful of well known prayers.
One of the most important aspects in prayer is that you have to be honest. Don't pray for what you think you should pray for or what you think you have to pray for, pray the way you feel. God knows everything, so He's going to be able to tell if you're lying in prayer. Just be honest. If you hate someone, say it, then ask for God's help. If you're angry, don't pretend like you have everything under control. God is always there to help us with his infinite wisdom and love, but if you refuse to acknowledge your angers and problems, He can't help you. God will not force you to listen to him or come to him, you have to do that yourself.
If you don't know where or when or how to pray, here are some ideas I've found useful.

Where to Pray:
Quick prayers can be made anywhere, but I find it easier to concentrate for longer prayers when I am at somewhere quiet.
-a church
-your bedroom
-outside in a secluded area
-a park
-while walking around the block
-while running

When to Pray:
Again, because I enjoy quiet thought, I often choose times of day that provide me with peace... but any regular time that makes you get into the habit of praying is probably the best choice.
-right after you wake up in the morning
-before you fall asleep at night
-before meals
-whenever you see or hear a certain signal (for example, if pray after you see a cross or after you hear a bell)

People invest in the future every day. You go to school so you can eventually get a job. You save money so you can eventually get a car. You practice hard so you can eventually win the race. But how do you invest in the future of your spiritual life? An everlasting life with God should be much more important than a job or a car or a victory (and it will certainly last longer). So invest a little prayer every day in your spiritual bank account. It will be well worth it.