As with most things, the best method is to keep things simple and adaptable for you. Do whatever suits you during the week but base the training on getting out and doing some long days on the route. Start by having your long day as a leg of the BGR (actual or equivalent depending on where you live) and work towards 2 legs and then 3. Also get some consecutive big days in. The rest of the sessions are filler and probably tread that fine line between optimal and overtraining.