Personally, I see a psychologist, but there are other options out there. I started seeing this particular psychologist because I was having trouble with depression and needed a place to be able to have some objective support. I have bipolar disorder and PTSD, so my therapy has been dealing with issues of coping with my illness and with my past, and how both of those affect me in my life today.

Not everyone who has bipolar disorder needs therapy, but I'd say if either depression or mania start really affecting your day to day life, therapy might be an option to work through those issues.