I have some hair issues...?

So I am a Freshman this year, but everyday of last year I would take a shower at night then straighten my hair in the morning. I didn't use heat protectant until the end of the year and it helped for only a little while. Anyway, right now my hair feels brittle and very dry and I dye it on occasion, but I don't want to stop straightening and washing my hair every night because I want to look good for school. Any tips that could keep my hair shiny, smooth, and soft?