I was just curious if there was any recommendation for implementing it on responsive templates.
It depends of your knowledge of CSS, if you are working with RWD - I always suggest to read few articles about this technique or even books - it will help you understand how it works in general.
1) The main tip is try to do not use "!important" values, which can break template.
2) Sometimes you don't have to add additional module position - because you can also add modules into articles or inside another module.