FI and I are signing up to contribute in 2010, but we've never contributed to one before so we're not really sure how much to put into it. We won't have a vision plan, so I'm thinking enough to cover an eye exam/glasses or contacts (because I think I'm going to need something--my eyesight has gone downhill). What else do you use yours for? How much do you recommend putting in? Do you do the debit card option?