I'd admit that could be affected your work if you did it work. You know..? First time I went to online business as part time job, I always hurry to success with my business. I want to quite my job thus I care with my offline works, but I pay more attention to online business. My fails..
I learnt about those, I set up plan for my online business. You no need to work hard, but smarter... You spend a few time for working with online business, the remain for your families, and friend...
So, the key of success online is to enjoy and keep working....