Where is one to read Kerias Shema Sheal Hamitah, in bed, in his room, or can he do it anywhere in the home, including in Shul?
Ideally, Kerias Shema Sheal Hamitah is to be read near one’s bed, immediately prior to going to sleep. Practically, however, if one will have much greater concentration if it will be said elsewhere in the home, or in the Beis Midrash, then one may say it there and then simply repeat Shema and Hamapil right before he goes to sleep.
 See Michaber 239:1 “Korei Al Mitaso”; Ayin Beis p. 1001 “When one reads Kerias Shema Sheal Hamitah, even when he is falling asleep..”; Toras Shalom p. 7 that one must exert all possible effort in order to not fall asleep.
 See Kefar Chabad Volume 754 p. 20 that Rav Mendel Futerfast once related that for the sake of saying Kerias Shema Sheal Hamitah properly one may even go to sleep for 1-2 hours and then reawaken and say it! Hence, certainly it may be said in another area of the home, or even in Shul, for the sake of concentration.