well, decided to share my tips with you guys after seeing people having problem with cleaning lens all the time.
Please do not, I say again, DO NOT use any tissue, liquid,your breath, or any other weird stuff on your len. There is a coating which you may destroy. My advise to use a good blower(fotoguide), or airbrush, or air spray(from cathy) to clear off any dust and sandy particles before wipping.
For wipping, go buy some good quality silk cloth. Traditional craftmen use silk to polish precious stones and to remove statics on metals. Since they can be used on PRECIOUS GEMS, they can be used fo your lens too. Infact this is the only thing I ever use. Till now still no problem with that. Infact my len is always in tiptop condition.
Apart from learning how to clean your len, you must also learn how to take good care of them. Use a UV or skylight filter to protect your len. And do not peek at your len so close that your breath actually come into contact with it. control your breath when you need to inspect them. This should do the trick.