It is advisable to wear your corset over a thin undergarment such as a tank top, camisole, slip, or tube.  This will help keep perspiration and body oils from your corset, which will keep it cleaner longer.  Plus, I personally feel the corset is more comfortable over a thin undergarment.  If you are a daily corset wearer we recommend alternating between 2 corsets to allow  your corset time to air out between wearings.
Your corset should be dry cleaned only-never submerge your corset into water.  For light cleaning your corset can be wiped down with a damp rag.  
**Corset with straps, the straps are sewn in to the front of the corset and pinned in place in the back.  These need to be tried on and tacked in place to insure proper fit.

Wearing your corset
It is important to mention here that your should put on your stockings, shoes, or socks BEFORE putting on your corset (unless of course you have someone who can do this for you), as this will be very difficult to do once your corset is on.  
Your corset will arrive to you properly laced up the back.
To begin, open the busk (one hook of the busk is positioned to the inside of the corset for shipping purposes only, this keeps it from coming apart during shipping) and loosen the lacings of the corset as much as is need to easily wrap the corset around your body.
For corsets which have a closed front or the button corset style, you will need to unlace the corset and relace it on your body.
Next wrap the corset around your body and fasten the busk.  Start towards the hooks in the middle of the busk and work towards the top and bottom from there.  Don't worry, you'll get the hang of it in no time!
Once the busk is fastened begin pulling the lacings in a bit.  Make sure the waistline of the corset is sitting at your waist, you may need to pull the corset down and stretch your torso to get the corset properly in place.  You will want to slide the back protector behind the laces at this time as well.
Now you are ready to finish lacing the corset.  Begin pulling the lacings in with the "loop" that is located at the waistline.  The lower part of the loop will pull in the lacings from above the waist, and the upper part of the loop will pull in the lacing from below the waist.  Pull the excess lacing in from the top to the waist and from the bottom to the waist till the corset feels snug, but not too tight.  It is important for the first few wearings not to cinch the corset completely closed, your corset and your body need time to break in.  With each wearing you will be able to close the corset a little more.  Remember to take it slow, don't rush it, you could potentially damage the corset or your body.
Once the laces are pulled in sufficiently and evenly tie the laces off at the waist.
Incase you would like to hide the laces some of the length can be moved to the ends of the lacings and once tied off tucked up under the bottom edge of the corset.

Taking off your corset
ALWAYS loosen the lacings BEFORE undoing the front busk.  Not doing so could snap or bend the busk.  Undo the hooks of the busk similar to hooking the busk, start towards the middle and work out from there.