Hi Mac. Good look with travels. I have about 15 years solo travel experience, so can share a bit of advice. My list of tips is below - but really just keep your wits about u and u'l be fine.
#1. Email yourself a scan of your passport in case your lose it.
#2. Also text yourself your passport number, expiry date & place of issue. It makes it SO much easier to check-in at a hotel than scrabbling around for ur passport.
#3. Make a simple list of currency conversions FROM local currency BACK TO your currency. Put it in your wallet for easy access (e.g. 100 Rials = 1.32 dollars **NOT** 1 dollar = 0.174 Rials, etc). Also stick another copy into back of your Lonely Planet for even easier access.
#4. Memorise 5 key phrases in the local language "Excuse me", "Hello", "Goodbye", "Thanks", "Thank you very much". That's all you'll really need.
#5. Carry your valuables in a simple plastic bag or cotton bag. No one ever thinks anything in a plastic bag is valuable. Don't carry a day backpack. Yes, they are comfy but they SHOUT "I am a tourist!".
#6. Triple check every time your get on a bus/train that it is going to your destination. First ask the driver, then ask a fellow passenger, then ask another passenger.
#7. Carry your smartphone with you and join websites like Travlbuddy, Wandermates.com and VivTrav to help meet other people (like me www.wandermates.com/profileview.php… :) None of them are perfect, but they are useful.
#8. Stay in hostels, they are THE BEST place to meet other travelers.
#9. If there are no hostels, go on 1 or 2 day activity outings, e.g. diving, climbing, canyoning, etc. They are another great way to meet people.
#10. Go on a backpacker bus, e.g. Paddywagon or Backpacker tours. They are brilliant also and a great way to hook w the ladies :)