Any pros out there, Advice would be wonderful, but the good kind.. No, "just give up and study accounting", because I'm not the quitting type
Be prepared to stay late.
If you don't know, say so.
If you don't know, not only say so, but make it your mission to find out for next time.
Use as much gear as you can. Hire. Borrow.
There are some great books written 30 years ago. Apertures and shutters are still the same. Read. Your manual. Magazines. Books. Forums.
Don't believe everything you read.
Research. Location? Get on Google Earth. Google Streetview. Use The Photographers Ephemeris. Where will the sun be? When? How high in the sky? Get on flickr. See how other folk have tackled it, work out how you are going to tackle it.
Plan plan plan. Don't carry every bit of kit you own. Know what you'll need. No more, no less. Except for batteries and memory. How much will you need? Take double.
Make sure every job has a benefit for you. Sometimes this is only money. Sometimes it will be a notable face that will enhance your portfolio. Sometimes it will be a tricky situation or technical set up. Sometimes it will be all three.
Charge a rate. ALWAYS charge a rate. ALWAYS
charge a rate. Be it mates rates for mates. Be it charity rates for charities. Be it the union rate. Always charge for your time, that way it's worth something to your client. People don't properly attribute value or worth to folk doing freebies. As soon as you are charging then folk will take your calls, will be there when they say they will, will go in with a plan.
This last point is the last single most important lesson somebody new to creative work can learn. Your time is worth something. Make the material good and they'll come back. You want repeat work. Do it free or cheap the first time and you've set your rate for the relationship.