facebook etiquette

i only realised very recently that it is polite in facebook to wish friends happy birthday on their birthdays, write individual thank you messages back when u receive good wishes on yours, and wen someone writes you something on the wall you need to reply back not on your own wall but on theirs.

so sori to all those kind ppl who previously wrote me messages but never heard from me again.
and nowadays i am endeavouring to remember to wish ppl happy birthdays on facebook whenever i log on. but i think i will stop doing that wen i become sick of facebook, a time which i suspect will come very soon.