I am a Baptist, and usually give up something for Lent - it's not something that has come up in services or from leadership, just something I felt I wanted to do. A couple of years ago DH & I fasted for Lent, which meant we didn't eat from sun up, to sundown. I did allow myself drinks of water though (it was hot that year, I was working shifts outside, & would have been ill otherwise).
Having said that, Lent can be as easy or as challenging as you decide - one friend gave up listening to music last year. I couldn't have done that. Giving up something you don't really like in the first place isn't really the point. It's meant to be a sacrifice, even if it's only a small one. If you're not religious, or wanting/willing to try something different spiritually, why bother?
Lent is only 40 days, but this only works out if you give yourself Sunday off. I think that was partly because in Mediaeval times the sabbath was seen as a feast day (and most people would't have had much during the week).
In the past I've given up chocolate, sugar in my drinks/on cereal (& I can't think of the others, I have a cold which is giving me a fuzzy head). That was before I knew Lent didn't have to cover Sundays!
Last year, I used the 40acts website, which focussed more on doing something for the 40 days (and thinking), rather than on sacrificing something. I hadn't tried that before and it was interesting. Got me doing things that I might otherwise not have thought of. This year, we're doing a family Lent resource that I downloaded from Currclick. It does have more of a religious focus than 40acts, but believe it will get us thinking about some topics as a family.