Just as a simple starter on delay..
Short delay time plus minimal repeats = Rockabilly slapback echo
Medium delay time + minimal repeats = Reverb sound
Medium delay + increased repeats = Edge sound also good for DUB
Long delay + Minimal repeats = Large room echo
Long delay + Increased repeats = fun with arpeggios
This is just a real basic idea of what you can do, I've had my delay for about a year and a half and am still learning new tricks with it, don't be afraid to really tweak the knobs and experiment.
As far as both pedals..if you are running them both into the front end of your amp, I'd suggest delay THEN reverb....that way the delayed notes run through the reverb as well.