Don't be nervous
I know it's silly to say and you probably will still be nervous but don't be. The girls on the other side are just as nervous if not more. They've been preparing nonstop for you the previous week. No one wants to be the reason you don't choose their house and everyone is genuinely interested in you and you finding YOUR future home.
Don't choose a house for your friends/family
These sororities want you. Don't choose a house just because your friend Becky likes that house or all the girls are in that house. This is a time to be utterly selfish. You have to choose the house you feel most comfortable in. I personally went another house from my mom and my sister. I really loved both their houses but I knew that it was my decision and it just so happened to be another house. It was a super hard decision for me but I knew in the back of my head, I would be happier in the other house. Trust your gut and don't let others influence your choices.
Keep an open mind
Don't always trust the typical stereotypes of the houses. You need to form your own opinion about each house. Even the same sorority can be different at different schools. Remember that each day you come back to a house it is because they want you. They see something special in you. Be respectful towards every house because they have worked so hard and prepared to meet you and have you in their home.
Don't worry if you're going through as a sophomore or junior or whatever
It does not matter how old you are as long as you stay true to yourself and trust your gut. They may ask why you waited to go through recruitment and it's okay to tell them your reason. Whether it's because you transferred or you just weren't ready yet. They are there to get to know you better so it's always better to be honest in your conversations.
Have fun and meet new people
Talk to the girls next to you in line. I have met some amazing friends through the process. You never know they could be your future sisters. Also, stay positive. I know that this process can be tiring and disappointing. Just remember that it truly works out. You end up where you belong. Have faith that you will find your people and it will all be worth it.