The best way to spend your money

The best way to spend your money is to put them into advertising. Like Google Adwords, for example. Of course, the main problem is the one who tries to use this service - it has very sophisticated settings, work logic and stuff like that, and probably, in some time I'll find this tool very useful and beneficial, but for now I just spend my $20 without any success :)
The best way to avoid errors is to learn on the errors.