Open April 100 Put options for RIMM @ 6.80

I bought 1 contract of April 100 Put options for RIMM. I initially set my limit at 5.50 when the price is 5.90 but then I left for lunch and when I come back it's around 6.60 and starts climbing and finally I got it at 6.80. I know that next time I should react faster but last time when I get my GOOG call options, I just left the order and it got executed. I think it all depends on the situation when you see a free fall and climb up really fast, I think it's better to put market order or at least set it on the bid price.