Just go one step at a time man, focus on the little things to get started and let your routine take over. Take a shower, get dressed, choke down some chow, all the little things you normally do on autopilot. Just find something, ANYthing, to focus on. I wont kid you, it doesnt help. Much. But at least you wont show up in your undies.
Sorry I dont have anything more than words to offer you. I know how little they are to a hurt that big. All I can say is, just put in your mind the honor they are doing him to be buried in Arlington with his brothers. Focus on showing the world how proud you are. That has to be your job until its done. Prayers are with you my friend.
BTW, if you go through Tinker, and you meet a young guy named Lopez that has a Hawaiian accent, say hi for me.