Motivation is a funny thing. At times it is easy to find, usually when it is needed the least. Other times it is nowhere to be found and this is when you usually need it the most. Let's look at a couple of prime examples.
It's 3:00 pm and you are taking a break from your work on the computer, where you've been sitting for the last 2 1/2 hours. You look out the window and see that it is a nice, sunny day with almost no wind and temperatures in the low 70's. You are motivated to get out and ride, but know you can't because you have another 3 hours of work to do at the computer. For a slight diversion you read a popular cycling blog about an awesome MTB race and you know that if you get out there and ride, you could do that.
You are highly motivated at that point in time. You start making plans in your head about how you are going to get out there and ride, primarily before work as your schedule makes that about the only time available. You have visions of getting stronger and faster on the bike, of losing weight and feeling good.
It's 4:02 AM. our alarm went off 2 minutes ago and you are still in bed, trying to get yourself up to go ride your bike. You know you should. You know you'll feel better if you do, but it was a late night and the dogs were up barking at 1:17 when the party next door broke up. You can't keep your eyes open or truly focus. You have absolutely no motivation.
You tell yourself, missing just one day won't hurt, there is always tomorrow. You tell yourself you forgot to check your lights last night in the middle of the chaos of homework and dinner and late night company so you just know they are dead. You hear the siren song of your pillow and quietly succumb to it.
There is truly only one way to overcome example #2. That is to be so excited and amped up with motivation in example #1 that it carries over to the following morning when you actually get up and execute the start of the plan you laid out for yourself. Unless you can manage this, or have some other external factor, like someone who is counting on doing it with you, it is neigh on impossible to overcome the lack of motivation.
I hope you are motivated and get on your bikes and ride!!!!