way to finish off the thread shakinPF... lol
checking once a week is definitely not overdoing it. if you have a very long commute, checking before each trip isn't a bad idea.
these engines don't really leak. puddles under the truck is normally the first sign but if you check your fluids often, you may just notice it on the dipsticks.
if you have a clutch, you also want to check that fluid... blinker fluid also comes to mind. :X
i like to stick to the same brand of fluid but i do add whatever is handy if/when i am really low.
i also grease all the zerqs when i do oil changes.