First:
See what people mostly download
Make long adventure maps, that would get famous fast!
Update that adventure map, so people will download it again, and you get more exp points!
Second:
Don't make a lot of skins, they are not very famous, after all, there are over 100,000 of them on planet minecraft!
Comment on things, don't advertise, just be nice, and someone might decide to click on your channel!
Learn to make mods! They are so famous to people who are sick of non-modded minecraft!
Third:
Be in chat alot, chances are if you are nice, MORE! people will click onto your channel!
Fourth:
Do not beg people for diamonds or subscriptions, they will do the exact opposite, maybe even report you.
Fifth:
DON'T BE A SPAMMER! Do not link your stuff all over other people's posted items, it's annoying!
Sixth:
Be polite in chats, get a lot of friends!
Seventh:
Don't feed into trolls, they make you look bad!

MORE TO COME SOON!