Sports bras also work very well, especially if you need to boy mode at work or around family.

Find ways that make you feel feminine and confident. Painting your nails, buying new clothes. It helps to have a friend who's also fem around to help you navigate everything, but even if not there's a lot of resources online.

Be patient. Prepare yourself emotionally. Emotional changes were some of the first I experienced. Having good friends and people to talk to can make a big difference.

It's honestly hard to say exactly all the ways you can prepare. Starting on skincare and makeup can be good ideas, but its kinda daunting and not what I'd recommend concerning yourself about first. One of the other commenters mentioned exercise, which is great advice as is eating healthy. A lot of changes are hard to anticipate and how we all handle them can vary quite a bit.

Above all let yourself be excited!! Your wait is almost over :)