BAA Variable Star Section http://britastro.org/vss/
BAA VSS light curves http://britastro.org/vssdb/
BAA VSS Facebook page https://www.facebook.com/BAAVSS
SPA VSS Facebook page https://www.facebook.com/SPAVSS
The next two guides (PDF downloads) are based on Excel 97-2003, but the principles involved will also apply to later versions (although the method for plotting graphs will be slightly different)
Using Excel to generate eclipse predictions When will eclipses occur?
Using Excel to create phase based light curves for eclipsing binaries When did eclipses occur?