Patience, patience, patience...
Only bad things happens fast in reef keeping.
Lot and lots of reading and researching. It never stops, which is what makes this such an interesting hobby. The web is great for that.
Ask questions. If you are not sure or ignorant of something in particular, just post a question and there will be lots of more experienced reefers that would be happy to help.
Remember, nothing is gospel. Reading and discussing with others will help guide you in the direction that best suites you and your set-up.
Remember no two reef tanks are alike. What is successful for someone may not be so for you.
Keep an open mind.