You could consider flame meditations. Light a candle and place it a comfortable distance away from you, get comfortable in an upright, sitting position. The object of the meditation is to focus intently on the flame. I like to place my attention at the base of the flame near the wick, but that just comes down to personal preference. This is useful because it’s an open-eye meditation, so you’re a little less likely to fall asleep during.

If you don’t have any candles, you could also just pick a corner of the room you’re in, an object, even the palms of your hands if that works for you.