First, please cleanse and/or purify it! It really makes the charging process go more smoothly and have a better effect.
And before you start your chosen charging process, make sure all disturbances are blocked out. Unplug your telephone, close the windows/doors, etc. To maintain serenity in your charging proccess really helps, so I find. Light incense, candles, whatever you wish!
A lot of charging is just transmitting energy. So, just do so!
Oh, and keeping your ring in a sea-salt filled bowl when you arent wearing it really helps it, as salt draws in good energy and wards of negative energy.
Hope this helps!