You start by answering question 1 and then come back each day and answer the next one until you're done. You don't have to do it for 30 days in a row you may take breaks. Also you can post pictures if you want.
Day 1: Favourite male character?
Day 2: Favourite female character?
Day 3: Favourite guest star?
Day 4: Least favorite main character?
Day 5: Favourite couple?
Day 6: An 'unpopular' couple that you like?
Day 7: Best Kiss?
Day 8: Favourite friendship?
Day 9: Least favorite couple
Day 10: Favorite season?
Day 11: Leastfavorite season?
Day 12: Favourite episode?
Day 13: Least favorite episode?
Day 14: Something you hate about Friends
Day 15: Funniest character?
Day 16: Your favorite OMG moment
Day 17: Favourite actor?
Day 18: Favourite actress?
Day 19: One of your favourite quotes?
Day 20: Scene that made you cry?
Day 21: Scene that made you laugh?
Day 22: Scene that made you angry/annoyed?
Day 23: One thing you wish never happenned?
Day 24: One thing that you think needed to happen?
Day 25: An episode you wish never happened
Day 26: The most overrated character?
Day 27: The most underreated character?
Day 28: Favorite premiere?
Day 29: Favorite finale?
Day 30: Your all time favourite thing about Friends?