Email address problems?

I am experiencing a similar problem with email to that I have with phone numbers, I don't know how to organize and use them. I have a personal account at gmail.com, and one with my name in at gmail.com, this would be my business email. However, would this look unprofessional? My main problem is that I would be starting more than one company and be involved in several projects. These would all have different company names, so I couldn't really use myname@somecompany for a different company to that one. I don't want to have a different address for all my companies though. So, which address should I use? Also, what address should I use to contact suppliers before my first company is in existence? I am very confused, can any one offer any advice? Also, I want to get this email on my phone.

The use of 'free' (public) addresses as points of contact and the use of eMail addresses that do not 'match' the Company name are 'red flags' for those wishing to avoid being conned and taken for a ride.

For sure, if the Company was 'The Little Red Book Co. UK', I would expect the 'contact' to be "JohnDoe@LittleRedBook.co.uk" ... for sure I would NEVER follow up a link to "JohnDoe@yahoo.co.uk" (or "JohnDoe@msn.com")... and would think twice if it turned up "JohnDoe@BrownBook.ru"

If you have websites for your companies you can setup a "contact" webpage where the people type their e-mails on the page that you made. That way, depending on where it came from you can have your website categorize their subjects so you know where they come from.