1
be friendly, like others posts, people love it when you comment 'good job' or something kind on something they worked hard on
2
dont spam like unless they allow it, they might be annoyed if they see you did it
3
be interactive, make friends, enter contests, people can find your account easier if you do this
4
make contests, dtiys, stuff people can do or read to get to know you
5
dont say something that causes others to feel sad, or if it is a joke say /j or dont take that seriously
good luck