According to Honda Civic 2001 manual after 48,000km (mine now 47500) I have
to do these things beside changing the oil rotate tires.

1) Inspect and adjust drive belts
2) Replace air conditioning filter
3) Replace air condition cleaner element.

I want to do these by myself this time. I am not sure what of these I can do
it at home (with help from car manual, instructions from you/websites etc)
and which one can not be done at home (I suspect the first one).
The reason I want to do it beside saving money, learn something, and I have
the time to do it, so why not. Any help/direction/advice etc about how to
do all these above would be very much appreciated.