Just remember to follow the usual rules:
No more than 5 prompts in a row, no more than 3 prompts per fandom. If a prompt is answered, you may prompt again.
No spoilers in your prompts until 1 week after the original air/publication date. If there's spoilers in your response, please warn in bold and leave at least 3 spaces.
Remember to format your prompts appropriately and keep them to a reasonable length. For example:
NCIS LA, Eric/Nell, that's what partners do
Supernatural/NCIS, John Winchester/Gibbs, Semper Fi
And if none of our prompts are catching your attention, there's always the Lonely Prompts (I would link you but I'm doing this from my phone!)