A good place to start is to read about the different equipement available and how to use it, try Astronomical Spectroscopy for Amateurs by Ken Harrison, or his book on grating spectroscopes. After that it would be good to look at some website of people who are doing spectroscopy, such as http://www.threehill...pectroscopy.htm, http://www.astroman.fsnet.co.uk/spectro.htm
For more info and software help and general assistance look at :
http://astrosurf.com/buil (Christian Buil)

Visual Spec (Valerie Desnoux)

www.astrosurf.com/aras/(Astronomical Ring for Access to Spectroscopy)

http://spektroskopie.fg-vds.de/index_e.htm (VdS Spectroscopy section)

http://www.astrospectroscopy.de/ (ASPA - Ernst Pollman)

http://spectroscopy.wordpress.com/ (Club of Amateurs in Optical Spectroscopy - ESO)

http://www.astrospectroscopy.eu (Lothar Schanne)
or any of the yahoo groups, which are full of very helpful people:
http://tech.groups.yahoo.com/group/amateur_spectroscopy (English language group, mainly but not exclusively astronomical)

http://tech.groups.yahoo.com/group/spectro-l/ (French/English language group to support the Astronomical Ring for Access to Spectroscopy (ARAS) )

http://tech.groups.yahoo.com/group/SBIG-SGS/ (English language group for the SBig SGS spectrograph)

http://tech.groups.yahoo.com/group/spectrohelioscopes/ (English language group discussing design construction and use of spectrohelioscopes)

http://tech.groups.yahoo.com/group/staranalyser/ (Mainly English language group for the Star Analyser spectrograph)

http://tech.groups.yahoo.com/group/astro...l_spectroscopy/ (Group primarily for the L200 kit spectrograph but also general topics).