im lazy and use the automatic classification

but for manual setup:
create one rule to put everything in default class 255.
for that you leave everything at default.
local ip range 0.0.0.0 - 255.255.255.255
remote ip range 0.0.0.0 - 255.255.255.255
local port range 0 - 65535
remote port range 0 - 65535
just change priority to 255.
for the other rules.
leave local and remote ip, local port range at default.
change the remote port range to the port(s) you wand to QoS. like 80 for http.
and assign a priority.
you do this for every service you dont want to put in the default class with priority 255.
assing each service a priority class that makes sense. like gaming and real time services i would give a priority of 50.
but i think that hassle isnt worth it. the automatic classification works just fine.