I have always been asked this question, how do I am manage to run all year round and still not get bored of it (at any point in-between). The answer is quite simple, first things first I enjoy running (without it, its impossible). But, to make is a self sustaining activity, you need a lot many more things.
Even after about 6 years of regular running, getting out of bed early in the morning is a very big effort, it is not easy. (which is evident from my Freedom run starting at 9am instead of the planned 7am). Plus on a holiday its even more difficult, as I don't really have a deadline which I have to beat (which is very much there on a working day). But, once I hit the road it is a lot of fun, relaxing and nothing like what it was to get me out of bed. I have to run in the mornings, don't really have much of a choice, the stray dogs and traffic make running in the evenings impossible (as I run on the highway). So running very early in the morning or very late in the night, I can beat the traffic but the stray dogs are at their very best and I have to be extremely alert, to avoid being chased by them.
The biggest thing which works for me is that I try to bring variety, add some fun elements, throw in some adventure and also reward myself. I plan and do a midnight run or a 4am half marathon or do a freedom run or run on a route I have never run before and yes run on totally unknown routes in other cities when I am travelling (Hotel Gyms just do not make any sense), all of these things at regular intervals and in small dozes make running more fun.
I love coffee and am also aware that too much of it is not good for me, so I try not consume any coffee during the week except on the days that I run, when I unwind with some strong coffee at my favourite coffee shop (and this does not necessarily need to be immediately after the run, I can also store these rewards and use it the next day).
Shopping for gear (shoes, singlets, energy drink, shorts, socks, energy bars........), at regular intervals I go out to shop for new things which would aid or make my runs more fun. There is no high like shopping for sports gear, it lasts a lot longer than shopping for regular clothes.
You need to have races to run and participate at different times of the year, running regularly becomes a lot easier. So you train for them, once you have zeroed in on a race. Its a lot easier to break it up week by week and to continue running.