hmmm, off by few sec is normal and u can calculate average speed.
For me i run in a 4km loop, so i mark the route what time i should reach at 1st km n soso...so tat u no need check your watch so regularly. Make a Control time at the normal course u run, and become your baseline to improve, 

Hey. Noob and curious question here but I never really knew but what are the primary factors that slow down one's pace when running?

Oh, I mean the things before your run, while you run, and things you eat maybe? I mean the things that would make 6:48 drop to say, 8:32? Last 2 days was at an above average pace of 5:34. Had a delicious but unhealthy burger (you know the ones from ramlee's) for dinner. Next day was my rest. The following morning, I was at 8:32. And that was not running all the way. I walked at some points. Haha.

So I was wondering could it be the burger? Just some extra cholesterol would damage your routine that much? Or am I lacking rest? Because I experienced soreness in my calves and thighs.

Another question, in the morning, it's a habbit for me to drink at least 4 glasses of water. But I cut down to 2 when I am going to run in the morning. How long do I have to wait between the water drinking and running?

i pretty 100% sure you are serious about (1)

Haha. Thanks a ton! I don't expect people to teach me, but things like what you're telling me are the keys, so I can narrow them down and do more research, right? Haha.

I've looked into it, the meal I had for dinner was definitely not the cause of my pace drop.

I do suspect as your second point stated, not enough sleep. Because I had a busy night organizing an event.

I never drink less than a gallon a day. So, I don't think that would be a problem.

And yes, I am a regular runner. 4-6 times a week. Some twice a day, but easy runs. And during my day offs, I usually train my muscles with some light weight training.

I don't really know much about shoes. Can't afford one at the moment. Girlfriend bought me these: Nike Lunarglide. So, it's the only shoes I can wear. Overpronator speaking.

Additional question (while I am googling and still doing research), what causes breathlessness? Sometimes I do get that. It's pretty annoying when you slow down because of that and you hear Endomondo saying "One kilometer in 7 minutes and (and here you expect the seconds to be low, but then..) 48 seconds." and you'll be like..."SHHHYYYTEEE.." Haha.

Hope it's as shiny when you see the real thing! Hahaha!

I dun think there's any device tht allows U to post direct to FB. If U've seen some of LYN Runners training stats on FB, including me, we upload frm our devices to a training log software, I use Running Ahead.. & those software will upload the results to FB, if supported la.
I hv PJ Dawn's half marathon bib to let go, if Ur interested can PM me.

Phone was turned on all the way but kept inside a plastic which I assume it's safe since I have successfully did that in Singapore. But this round plastic torn, very unfortunate event. The rice thingy works provided it's not badly damage but in my case the whole motherboard and LCD burnt.