The best freelancing advice someone ever gave you?

What is the best advice you were ever given? Specifically towards freelancing.

It wasn't meant towards freelancing, but my grandfather who was a businessman his entire life always said "If it looks too good to be true, it is." Another one that relates more directly to business (also from him) was "There are two organizations you never try to fool, the mob and the IRS."

‎"If you go into Computer Science and you want to design games and nothing else or do not try your hardest in all your computer science core classes or you just play PC Games. It's best you drop out and join the IT or the tech-related workforce" - Me

My father always said "Believe in yourself and never give up". I think it's very important to live by.

'If you REALLY want something, you can get it' - Yours truly

(Sounds corny, but I truly believe that you can achieve allmost anything if you really want to)

From reading around, I think one of the best would be to have a contract. It's like a filter for clients. If you send out a contract, serious clients will gladly sign and send it back. Those clients you should stay away from would just stop communicating. Saves you from trouble later on.

Originally Posted by Jeroen G 'If you REALLY want something, you can get it' - Yours truly (Sounds corny, but I truly believe that you can achieve allmost anything if you really want to)

Yea i believe in that, and this one is really true, everything i wanted so hard i got, only it was matter of time, something comes sooner, something later.

Originally Posted by Patrick ‎"If you go into Computer Science and you want to design games and nothing else or do not try your hardest in all your computer science core classes or you just play PC Games. It's best you drop out and join the IT or the tech-related workforce" - Me

Pardon my cynicism, but what does that have to do with freelancing?

Avoid clients who don't type formally. Example: Using the word "there" as "der".

You will be bound for a difficult project.

Avoid "corporate" client who wants the best site for low budget
Avoid "corporate" client who has a 5+ decision team (" my boss loves your design but the management team thinks ... wait a sec, that blue is awful, could you please change it a bit and ... "