<p>When you move in, talk to your roommate about it. Most of the time, it’s generally a non-issue, but it can be helpful to talk about different sleeping habits if you are particular about something (or if they are). Tell them that you tend to be an early bird, and see if they have a particular sleeping schedule. If people have particular concerns (they’re a light sleeper, can’t sleep with the light on, etc), they’ll usually let you know, and either of you can adjust.</p>
<p>In general, common courtesy works out well. If your roommate is sleeping, be reasonably quiet and unobtrusive. Try to use a desk lamp, instead of the ceiling light. Try to keep the noise down–don’t play music out loud, for instance. If either of you are light sleepers, invest in some ear plugs. If either of you can’t sleep with the light on, get some desk lamps. Whatever problems you encounter, you’ll work it out. Most people are reasonable. Some are definitely not, but just be up front about what your concerns are and it’ll work out.</p>