Before you start mixing make sure that all tracks are recorded (by you or someone else). This is rule number one of how to produce music. You can not start to mix the tracks before it finished like that would be like trying to decorate the inside of the house when the roof is not in yet. You can also click here to get the best sound mixing online.

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If you start to mix the tracks before it has finished being written that will never be completed because when you write you need to consider certain things and when you consider the mixing of different things. Both conflicting priorities will draw you right and left.

Always fix any problems with what has been recorded at the time of recording – If you've recorded something or been given a song from someone and you can hear that there is a problem on the track where it is very important that this problem be fixed prior to entry into the mixing process.

Organize your environment before you start – Before you sit down and begin to mix the tracks is important to get all the weapons reach and make sure you have everything needed and close to hand. This is probably not one of the most helpful techniques of mixing music but it is important for concentration. 

There are many other online music mixing tips to consider if you are interested in helping yourself understand how to produce music.