There are a few buses which depart from Delhi and make an almost 8 hour journey to Haridwar. Buses are usually quite simple: reclining seats, chargers on board, and knowledgeable drivers. There are also cabins with sleeping berths available for booking. This is a novel way to travel, one which will allow you to doze off for a short while. Keep in mind that it's a pretty narrow berth which closes off from the general cabin with a small curtain.