Lots of very good advice here. You will unlikely run into any real trouble when doing a 'field strip and cleaning'. Things can really get involved when you go farther that that. The internet makes it fairly easy to find instructions - just Google "(your firearm model) dis-assembly" and all kinds of 'help' will come up. Many you-tube videos are great assistance, especially for a first timer; as has been noted, check out several. If you are lucky, someone has posted a step by step pictorial instruction guide for your model on a blog or forum somewhere. For a couple of outstanding examples, these two have rescued me with a CZ82 (now that pistol is one complicated detail strip) more than once:
http://leolani.net/relics/cz82.html -and-
http://sailorcurt.com/2008/04/cz-82-gunsmithing-part-1.html/.
I have always liked the tip about working inside a large clear plastic bag to control errant springs and pins, although I never remember it until something goes flying away, and working over a light colored old bath towel really helps keep the small pieces from scooting off the table.
My best tip is to always work in a clean area. Taking a firearm apart on an old work bench in a dirty garage is fine, until you find yourself on your hands and knees looking for a small pin or spring laying amidst the dirt and dust and detritus underneath the bench on a floor that has not been swept in years.
If something small does fall or fly away on a more detailed dis-assembly, approach your search with patience, diligence, and logic. To date, I have always found what I 'lost', but at times it took me hours, mostly because I was doing the work in an old, somewhat unkempt, garage.
And, for what it is worth, good St. Anthony has never failed me yet.