Pray for countries, pray for people groups, pray for missionaries, pray for those who have no access to the gospel. Get yourself a copy of Operation World or visit http://www.operationworld.org/ to help you pray specifically for different countries.
Pray along with prayer casts which show video footage of different countries while a national believer prays.
When you hear news from overseas, pray for the people affected and what is happening there. The more you pray, the more you will discover God’s love for people, and you might just discover your calling in the process.