Hi Gracie :) Welcome!
I've found that being as aware of my illness as possible is a good starting point to controlling it. There are a few books that have been utterly fabulous. Coping strategies, I have mainly focused on distancing.
As for how you get treated, this varies from case to case. How were you diagnosed?
I'm not on any medication now apart from the occasional diazapam. Have been on various anti depressants and anti psychotics over the years however.
The problem with medications and BPD is that the mood swings are so sudden and drastic, that unless you are on a mood stabilizer, they can be ineffective. Obviously if you have co-morbid conditions, they can be useful to combat those.
For BPD, the most recommended treatments are CAT, DBT and, most recently, STEPPS. The latter is specifically diagnosed for BPD, and I'm sure everyone else is tired of my ranting about how wonderful it has been, but it really has changed my life :)
Welcome again, and know that you're safe here!