RhatlandGood luck in getting your permit in california. Although in some areas it is pretty tough, they are obtainable.
There are many types of ways to conceal your firearm.
Like one other person said there is IWB( In The Waist Band) type holsters, Shoulder holsters, fanny packs, pocket holsters, concealment vests, ankle holsters,belly bands, normal strong side carry, and SOB( Small of the Back). I would recomend not carrying SOB due to potential injury to your spine if you were to fall backwards onto your back with your firearm in that type of holster.
The type of concealment that you choose to use will depend on the type and size of your firearm, the weather climate in your area, and the type of clothing you are going to choose to wear while conceal carry.
I carry a full-size firearm. I carry A Beretta 92FS. I use a Versa Max 2 holster from Milt Sparks. It is the most comfortable holster I have come across. So myself I would recomend Milt Sparks holsters for IWB type conceal carry.
The cost for one of there holsters is worth the money. This is Milt Sparks web site
www.miltsparks.com The wait though for a holster is 8-14 weeks. Well worth the wait though.
A good source for conceal carry issues is a web site called
www.packing.org. There is a huge wealth of information on this site.
Hope this all helps.