I have 3C curls and if you have anything less curly than that, my suggestions might be too heavy for your hair. But you can try.
I like to add a dab of coconut oil to my wet hair when conditioning. I try to only apply it to my ends and top layer of hair where it's the most dry. I do this almost daily (whenever I remember) and I like it more than just conditioner alone.
Don't waste your money on those packaged hot oil treatments. It's better to use extra virgin olive oil. I put some in a Styrofoam cup in a large bowl with hot water. I add it to my hair (usually I don't wet my hair). I leave it on with a shower cap for 20-60 minutes. I don't shampoo it out because that just get rids of any good effects the oil had on my hair. I do rinse it out with conditioner.