How should I do to reduce risk of getting nongonococcal urethritis?

Condition analysis:

Practice abstinence. Not having sex is the best protection against acquiring NGU and other STDs.
    
Use latex condoms, consistently and correctly, from start to finish every time you have sexual intercourse can reduce the risk of transmission of NGU and other STDs.
    
Have sex with only one uninfected partner who only has sex with you (mutual monogamy).
    
Have regular check-ups if you are sexually active.
    
If you have an STD, don't have sex (oral, vaginal, anal) until all partners have been treated.
    
Seek prompt, qualified and appropriate medical intervention, treatment and follow-up to break the disease cycle.
    
Know your partner(s). Careful consideration and open communication between partners may protect all partners involved from infection.

Instructions:
What are the Symptoms of Nongonococcal Urethritis: NGU symptoms usually manifest between one and five weeks after initial infection. In men the most common symptoms include:

-- burning sensations while urinating
-- itching, irritation, and tenderness of the penis
-- clear or cloudy discharge from the urethra
-- drying of the opening of the head of the penis