I just want to know if there are some techniques or some thing to prevent anxiety or control it somehow

You can try meditation

Thanks.
It's great, I'll try

Any other ways you have tried, anyone?

There are lots of approaches to psychotherapy to help manage anxiety- including cognitive-behavioral, interpersonal, psychodynamic and other kinds of "talk therapy" - that can help individuals address problems with anxiety. Psychotherapy offers people the opportunity to identify and learn to manage the factors that contribute to their anxiety.

I find that deep breathing, visualization and yoga help.

Minance... Anxiety.. is NOT about reality. Think about it... Lets say you are anxious about a fight or conversation or a confrontation with someone.

Or maybe its about loosing a job

or breaking up with a partner.

According to the ancient Hawaiian Huna philosophy, all illness is related to stress. The body’s innate healing abilities can be restored if you relieve the tension caused by physical, emotional, mental or spiritual stress. You can even learn to prevent anxiety by stopping stress in its tracks.

For instance, what is mental stress? Criticism, whether of yourself, another person or even the weather, creates stress and tension in your body. A quick mental stress reliever is “Saturation Praise,” spending just one minute focusing on everything you like.

Another Hawaiian stress-tamer is nalu (a form of shamanic meditation). You focus on something beautiful, breathing in the beauty and breathing out your stress, for a minute or until you feel sensations of relaxation or energy.

For an acutely stressful situation, it's good to have a few emergency backups including 1-minute yoga poses, directed breathing, mental imagery, positive affirmations, healing touch and massage, and other “instant healing” techniques you can perform anytime, anywhere.