Considering you spend around a third of your life in bed, it may be worth your effort to have one that is comfortable to you. Sometimes, getting a comfortable one can be difficult due to a partner's preferences or needs being different than your own. It is worth getting creative about it. This can include fans, softly purring machines of some kind or another. The more mental stimulants you have in your bedroom, the more you are training your mind that the bedroom is a place of activity, not rest.
Many people keep their rooms too warm at night.
It's best, if you live in the cooler latitudes to have your room around 60 to 65 degrees or so. This helps with the cooling function in sleep. If there is some light, please investigate window coverings that will block it out. Sometimes, there is something that is the cause of waking. Sometimes, when almost awake you'll become aware of things.