Watch where you put your feet!
The footpaths in Yangon are highly irregular to say the least! There are a range of pavement styles, and few are without major subsidence, large cracks, uneven joins, and/or gaping big holes! Most of the holes will be full of litter and beetle nut spittle, and look fairly gross. Not to mention the harm you could do to legs, shins, ankles and feet by an inadvertent misstep. So, even though you might want to gawp and take in the sights, just make sure you look where you are going.
I would also recommend that you wear sneakers/joggers or boots when walking around Yangon. The streets are very dirty, and there is plenty of unexpected litter and other waste lying around. Having your feet well covered may well be a good barrier, as well as providing adequate foot support.
We actually saw a lady rather indiscreetly, pull up her long and take a wiz on the side of a bank in a busy street.
Always carry a torch with you here
Due to the fact that the electricity can be turned off at any time of the day or night. To carry a torch with you here is imperative. You will notice here that all of the large hotels and hostels have large generators mostly out the front for power backup. Unfortunately the poorer establishments don't have generators...so you're left in the dark....Also there is very little if any street lighting. I carry a self-powered torch so as I am not let down by batteries...
Always carry plenty of fresh water
I found travelling in Burma (Myanmar) to be the hottest place that I have ever been anywhere that I have travelled. When "out and about" for the day ALWAYS make sure that you carry with you more than sufficient fresh bottled water with you for the day. To say this place is like a furnace is an understatement. The chance of getting dehydrated if not replacing lost fluids is severe. Most of my sightseeing was done by either walking or by bicycle. I found the heat and humidity of the day to be really oppressive and I was used to a very hot and humid climate.
Bottled water I found was not available everywhere that I went, so I used to buy many bottles at the supermarket and keep them in my hotel refrigerator.
State of the pavements
The state of the pavements in Yangon is bad. You need to be careful where you are walking. This is especially at night when I would recommend you have a torch with you due to the unforeseen blackouts. This pavement situation is common in downtown Yangon.
Unfortunately, not much has been done to manage the upkeep of footpaths so you will find all sorts of holes, jagged pieces sticking out and especially dangerous storm drains that look as if they are covered but are not!
Be especially careful of the central median strip opposite Sule Pagoda. My brother thought he would get a good photo and stood on a cement slab which lifted and left him with his foot down a gaping hole. It was just lucky he did not break his leg on the first day!!
Make sure you look carefully where you are walking and watch where the locals walk -they usually avoid the storm drain section. Take a torch with you at night as there are few street lights.