How do i get Justice Points quickly on WoW?

I’ve just recently started playing WoW again and i have a level 83 priest and i want to start getting justice points for heirlooms. But, i don’t understand how to get justice points really at all or especially efficiently, do i just join a dungeon queue and get JP every time i finish one? Please help, thanks. ^^ 

1. weeklies; every week you can get i think it was 150 JP per random Dungeon at lv 70+ only can do this 7 times per week.

2.bosses from dungeons Heroic ONLY. when you do heroic dungeons each boss you kill gives you JP don’t remember how much but at lv 85 i think it’s 30 per boss.

3. once you hit lv 85 you cang UNLIMITED JP from doing Heroic dungeons i strongly suggest you do HoT’s Which is Hour Of Twilight. they are heroic dungeons but very simple for the most part especially for dps and tanks. one dungeon on my Healer got me about 300 per run without a weekly. and i pretty much got ALL heirloom gear this way even the weapons, cape, all that shet it gives a good amount of gold too.

what not to do- DON’T waste your darkmoon faire tokens trying to get heirlooms this shet will take you months to get. where my method only takes days/hours.

DON’T waste your HP and converting it into JP this method is a waste of time.

it really is easy to get i got all the heirlooms in less then a month the hardest ones to get were the weapons since i am not patient to save an extra 1k JP but it is easy to get. the time spent doing this depends on your server and spec dps will obviously take longer due to longer que 

times. ALSO if your group sucks this is a big set back. idk how many times i did regular heroics like troll heroics and my party couldn’t even down the 1st boss with me, an over geared healer. and try not to skip many bosses they are good for both loot and JP although many shetty parties tend to skip the hard bosses because they don’t know mechanics.