Here are a few from me:
> track your time – especially if you’re juggling lots of things at once, it is the only way to know where the time goes
> the fact that you are small and nimble is worth a lot to your clients
> being genuinely enthusiastic about clients’ projects is worth even more
> rejoice every day that you do not have to (insert whatever you liked least about corporate life here)
> sleep is for later.