How do i improve my flow and rap skills?

Okay so i love to rap, i love music, and i love when i get in the zone. i've been rapping for about 6 months now and i love it, it keeps me nonbored all the time. but sometimes i be writing my lyrics and it seems like i run out of ideas and it seems like my flo goes outta beat sometimes. So what can i do to improve my lyrics and rap flo. I would appreciate your advice.