I am 31 going on 32 this fall, I have a few lines round my eyes, laugh lines. I can't imagine why you are so worried at 25/26 about getting wrinkly.
Probably the best thing you can do as FE pointed out, drink lots of water, eat right, get rest (though I know things are rough and it can be tough to do) and enjoy life.
The one thing I notice about you Brooke, is that regardless of the bs in your life, you seem to always keep smiling and keep happy. That will be the biggest reason of all why you stay youthful.
Just an opinion.