...as a budding entrepreneur.
1) Think carefully before registering a domain name for your company with more characters than a Hollywood award show. "www." and ",com" are 8 characters on letterhead, business cards, brochures, etc. before you even add on "repugnantreprobaterecyclers" or "pistolpetespizzaparlorandbordello".
Now, your humble scribe, must decide whether to forge boldly on with a most excellently spelled out but exceedingly long domain name or admit slightly embarrassing defeat and find a somewhat abbreviated but still respectable and stunningly brilliant moniker to represent the internet presence for my budding business.
2) Once you register your business with the state, you will be inundated with phone calls. Not from customers mind you, but telemarketers. Until I finally started blocking certain numbers, I was getting 10 calls a day from DirectTV alone trying to sell me satellite packages for my business.
Now, I know I'm new to this whole self employment/small business concept thing, and I don't want to tell big companies how to do their thing. HOWEVER, Annoying someone with repeated auto dialed phone calls who has only been in business for a few days and has only a very small likelihood of being in a position to have made any money yet at said business is not likely to endear said business owner to the product or service you are trying to telemarket.
3) Some people who say they are happy to help aren't. Some people who tell you you're crazy, though 100% right, are your best clients.
4) If you thought the tax code was confusing itemizing deductions on a 1040 for a W-2 wage slave, you have NO idea what confusing is. Google "calculating self employment tax" just for giggles and grins. Go on. I dare you.
5) There is no such thing as regular work hours and sick days are a thing of the past. Even when you are curled up in a ball under the covers having an anxiety attack, you are thinking about business (because it's what triggered the anxiety in the first place).
6) Customers and clients do not simply fall out of the sky or appear out of thin air. You must go stalk them, convince them that you are the best solution for their product and/or service needs and succeed in prying their hard earned money from their cold dead hands.