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It's difficult and requires a lot of practice, such as developing dispassion, contemplating death for perspective and motivation, developing contentment with what one has, seeing the world as empty of self, and realizing that these things aren't ours and can't bring happiness on their own and can actually cause us suffering if we become too attached (see some of my thoughts on clinging for more).
Yes, but only if you're a Chelsea or Leicester fan.
Seriously though, one can enjoy things, just try not to get too wrapped up into them and become angry when they lose or haughty when they win, etc. Have a healthy distance from them, try to enjoy watching without becoming attached and enjoy the sport for what it is.
I think it's useful to utilize the concept of the five aggregates as a means of analyzing the way we create a sense self in relation to/via craving in an effort to help see this process and remove the vast net of clinging that gives rise to suffering as long as we don't in turn reify them and construct a self out of them. I see the aggregates as more of a strategy to end suffering than concrete realities.