In the spirit of efficiency and distillation, allow me to throw out a few pearls to turn the glass of wine you're about to enjoy on its ear.
1) Why Are You Drinking?
It's important to recognize before you start your tipple, why exactly are you drinking? Are you obsessed with the subject and trying to absorb information like a sponge? Are you just tired from a long day and looking to relax with something familiar? Are you entertaining? Are you drinking just to drink? Taking a step back and defining this for yourself, in my experience, at least, can have a profound effect on your enjoyment. The act of simply having another person to drink with, have conversation with during the drink, or discuss the drink with, can turn a drink you wouldn't have thought twice about into something interesting and shared. Context is important. If it's a bottle going with a meal, that's going to change the mood and the flavour. How willing are you to share your purchases with others? Are you wanting intellectual stimulation, or the opposite, or something in between? All of these factors are going to affect your experience with a bottle. It's important to consider them.
2) What Are You Expecting?
Are you going into each bottle of wine expecting to be "wow'd" a la Owen Wilson? Expecting to be blown away by each and every bottle of wine is as unrealistic as expecting every first-time lover you ever have to know exactly where you like the action, if you know what I mean. Think of the wine as a person that you are willing to get to know, for whatever reason. Seeking understanding over pure pleasure requires a little more patience, but it also yields more interesting results, and I'll argue satisfaction, over time. Familiarity is the hardest drug of them all. Kicking it and opening your mind to the unfamiliar is sometimes harder.
3) What Do You Really Know?
If you had to go in front of an audience and try to speak intelligently about the wine you're consuming, could you? If you had to write a one-page report on it, could you? If you had to describe the wine using anything EXCEPT your own personal preference and perception of it, could you? If yes, then carry on to your own criticism, if that's what you're after. If no, maybe there's an opportunity to gain a better understanding of something and expand your mind and palate. If that's not your bag, then start again at step 1 and ask yourself why you are drinking in the first place.
There's no right or wrong answers, but you can influence the characteristics of your experience just by asking yourself a few questions.
As always, happy drinking!