Here are some links that I used to study and practice for my A+ Certification:

• A+ Links
  
  http://www.wwwebster.mcmail.com/a_plus.htm
  
  http://www.mcseguide.com/aplus.htm
  
  http://www.geocities.com/SiliconValley/Haven/8823/a.htm
  
  http://www.cramsession.com/cramsession/comptia/core/links.asp

• Study Guides
  
  http://www.windowsgalore.com/cert/aplus/windump.html
  
  http://www.cramsession.com/cramsession/comptia/os/guide.asp
  
  http://www.cramsession.com/cramsession/comptia/core/guide.asp
  
  http://www.examnotes.net/acorefrm.htm
  
  http://leuthard.ch/mcse/a_win.shtml
  
  http://leuthard.ch/mcse/a_core.shtml

• Practice Exams
  
  http://www.indussys.com/APLUSC.htm
  
  http://www.examnotes.net/AplusExam.htm
  
  http://www.indussys.com/Qzindex.htm
  
  http://www.concentric.net/~redward/
  
  http://www.clickx3.com/p2A+.htm

Well that should keep you busy!!!