1. A start-up guide and tutorial made by Onur Onder a grad student at Bilkent is Survival Guide for FPGA and Verilog Labs.
2. A helpful Web site, loaded with resources on Xilinx software, including quick start resources, tutorials for installing and using Xilinx Student Edition (XSE), project examples, labs, FAQs, links to useful resources, etc is the Xilinx University Program.
3. The University of New Mexico resources for Xilinx can be found at http://www.eece.unm.edu/xup/xup_unm_links.htm. Tutorials for ECE 238 are particularly helpful.
4. A nice tutorial (but old) for all aspects of the Xilinx software is found at http://www.ee.upenn.edu/rca/software/xilinx/foundation99/foundation.sch1.html
5. In-depth tutorials for learning how to use ISE version 6 (since the version running in lab is 6) can be found in ISE6tutorial.pdf
6. A short summary on how to use Xilinx ISE to develop a project is given in http://www.itee.uq.edu.au/~design/software/xilinx_tut3/