Congratulations. I started bike commuting this past May and my goal is to aim for two days a week if possible. I do try to pack everything the night before so I don't forget things and so far I've done pretty good. I did start to leave a pair of shoes at work for days I ride so that is one less thing to carry. I started using a backpack, then I switched to a trunk bag with pannier but now I use a combo. It will take a few times to figure out what works best for you. The more I do it the more enjoyable I find the rides.