1) There can never be enough sanitizer.
2) Get an accurate, waterproof digital thermometer. It will rule your immediate world.
3) Spend the 20 bucks on an autosiphon. Seriously.
4) Get a notebook, take notes. Lots of notes. Even the stuff you don't think that's important.
5) Spend way to much time on HBT and learn!
Stickies, etc. Lots of great folks have really helped make the process effecient and streamlined. I've got a folder on my GDrive that's got nothing but docs full of links, recipies, calculators and spreadsheets.
6) Use the media that's out there - I love listening to all the podcasts (BrewNation) and watching videos (BrewingTV) out there, it helps me understand the process and discover new ways to do things that I'm struggling with.
7) You get that thermometer yet?
8) Never be afraid to make a mistake.
9) No matter how bad you think you screwed up, remember people where making beer in cave somewhere long before all the worries of sanitation/temp/you name it.
10) It's beer. Don't overthink it. Sometimes simple is the best.