There use many forms of meditation, choose the one that suits you best.

Here are some:

• Breath deeply without pushing your limits, just focus on the air flowing in and out, when thoughts arrive acknowledge them and get back to your breathing feelings.
• Observe your thoughts. Observe every thought poping out in you mind ("My back is hurting", "I must remember to buy xxxx", "Damn my thoughts are out of control"...) let them just appear and observe them without judgement.
• Empty your mind, kill every thought appearing with a smiling "yes" and get back to an empty mind.

10 minutes everyday (consistency is key) will be fine.

And remember, that there's no "failure" of any kind, just do it. After few weeks you should notice some changes.

Thanks Arnaud Assad :)