Here are some quick tips:
1. Don't be afraid to put up a LFM - LSS, you are not the only one who wants to run a epic. A simple LFM suffices, Epic BoB, Epic TTT, EDA, etc. Often overelaborate lfms are shunned if the name is not known. But that leads on to the second tip...
2. Know the way to the quest - Call me superstitious. But there is no worse omen then having someone join your pug Epic OOB and ask, "How do you get there again?". Don't make the mistake of seeing loot you want, and immediately throw up a lfm. Come with scrolls/pots and be prepared, for info; DDOwiki.com is a good source.
Also the Interactive DDO Guide(http://compendium.ddo.com/wiki/Crafting_Planner) is hands-down the best all-in one tool for the game. Pro Tip: Set it to be "On Top" when needing to play and use the tool at the same time!
3. Be prepared to fail - Especially this if you consider yourself still green to epics. Most individuals who sport alot of epic gear is because of lots of fails and lots of learning time and time again. Anyone remember using the shield-wall technique for completing Epic OOB?? ::raises hand::
People benefit now from a wide pool of experience, but, be prepared to put your time in.
4. Use your words - Be prepared to ask questions when you don't know something. Communication is key. But also know that not everyone knows what they are talking about and there is more than one make-up/way to do a quest or raid. Always keep a open mind, taking people with strange builds or having a goofy makeup is a great way to make friends and have fun.
The worse that can happen is you fail, and if your not here to waste a little time anyway; then why are you here?