Tip #1 Get ready for a Hell of a good time!
Tip #2 get there as early as you can
Tip #3 wear comfy shoes
Tip #4 look for and plan exit strategy in case a problem arises
Tip #5 make it is easy on Secret Service as possible to clear you through so others don't get delayed behind you
Tip #6 if you are female or have a female with you, don't bring a purse or use a clear plastic purse for easy check through
Tip #7 don't put anything in pockets that you don't need.
Tip #8 bring some money to purchase a button, sign, flag or other items sold as memorabilia. ( might only get this 1 chance at a souvenir)
Tip #9 if you plan to get there super duper early enough to be in the front, bring a photo of POTUS for him to sign . ;) it is the coolest thing to have ( Although I don't see him go down into the crowd much any more)