There are some really good sites compiled in
HSC Drama Links ...
one of the things to remember about absurdist is the 7 elements:
A - absence of the plot
R - repetition
N - non-sequitors
S - silences
S - sense of the sinister
C - cyclic dialogue
P - pantomime
My suggestion is to find quotes/examples in the 3 plays that show these 7 elements and memorise them. That way you can incorporate them into any essay.
Um...not many people (actually hardly any) are willing to share notes...hsc = tough competition = every man for themselves. But any questions and we all try to answer them
hope that helps