This can involve a solid object or picture, a mantra, breath, or guided visualization. Typical objects employed include a candle flame or a flower. Mantras are sounds which have a flowing, meditative quality and may be repeated out loud or inwardly. The breath is also a common focal point. Finally, guided visualization is also considered by some to be a form of meditation.
Some techniques work better for certain people while other techniques work better for other people.
The important thing is to find what works for you. It is possible to practice meditation without subscribing to any particular religious views. However, meditation has been and still is a central practice in eastern religions for developing spiritual sensitivity. Christians also practice forms of meditation and prayer that bring them closer to God. In many traditions meditation practice is a means for reinforcing ethical qualities.