This is important.  If you live in Canada, you're not oblivious to the fact that winter = freezing off your pretty little behind.  Thickness should take precedence and the same goes for a lad.

If he doesn't keep you warm or shield you against life's nasty elements (although you should protect him as well), he's probably better left on the rack.     

Ensure the Coat Really Complements You

If you're committing to a nice article of clothing, you need to make sure that it suits you and your lifestyle -- fit, colour, style, etc.  Don't buy the coat if it washes you out or is too big on you or isn't suitable for an active lifestyle.

Maybe it's the style of the season, but if it doesn't work on you, you're going to be frustrated.  With regard to relationships, why invest any further if you know he's not the person for you?  Longevity and quality are key - for coats and relationships. 
 
Beware the Dry-Clean-Only Tag

If a coat requires a lot of care, exhibit caution before purchasing it.  In the long run, it'll be too expensive and a pain to maintain.  Know what you're getting into.

Similarly, watch out for the "diva dude" - if he freaks out about not having his sugar-free venti soy milk misto mocha cap every morning at 8:25, quietly leave him to his tantrum in front of the barrista.  He's probably too good to be true and you have better things to do with your time.

Choose Classic over Trendy Styles

A coat that's trendy is fun and exciting and will get you a lot of attention, but for how long?  A season at most.  Classic is usually the best rule to adopt.  It will last you throughout many a winter and there are several beautiful styles out there that look great on a diverse range of people.

With boyfriends, bear in mind the same principle.  Oh, shiny, pretty men are a blast, don't get me wrong.  But go with the guy who demonstrates classic signs of good relationship behaviour (honesty, kindness and intelligence) and he'll be a keeper, trust me.
 
Don't Rush

You'll find it.  The best coat is out there and it will come to you, not vice versa.  Sometimes you'll be tempted to just settle for a decent coat, because the mall is closing and winter is coming.  You know there are better ones out there, but you're tired of looking or running out of time.

Ditto for relationships.  Don't panic.  There is a great person out there just waiting to find you. 

                                                                    
fooled around + fell in love
 
In the end, I found my coat - it was beautiful, classic yet trendy, fit me perfectly and to top it all off, was on sale.  I was absolutely delighted.  I felt like I had been swimming in a sea of lovely but "just not right" coats, and finally it had come to me.  My search was over!
 
Everyone says we make a good couple.