How To Write A Letter I Hope You . The closing you choose should be in keeping with the feel of your letter, whether it is traditional or more casual in tone. I trust you’re doing great and enjoying the season. FREE 7+ Sample Encouragement Letter Templates in PDF MS Word from www.sampletemplates.com The closing you choose should be in keeping with the feel of your letter, whether it is traditional or more casual in tone. We know that this phrase only differs by one word, but it somehow sounds a bit more formal than “i hope this finds you well.”. Some subject lines to consider include: