But how to drive traffic?? or how to choose domains for parking. I want earnings nearly about 500$ / month.
if you want earnings around $500 a month, then you will have to:
buy domains that currently get traffic and produce revenue
these can be generic, generic typo's, or risky typos.
i would NOT advise buying domains for parking based on link traffic or pr.
only buy traffic and revenue domains where the seller can provide screenshots and or let you "test" the domains first.
the long shots will be hand-regged domains, but there are still some around that will produce revenue.
learning how to choose domains for parking is more than a notion
experience and having an "eye" for those names that have a high potential for type-in traffic will only come in time... you won't learn that overnite.
find a mentor or someone with whom you can bounce ideas with prior to acquiring any domain for parking.
imo...