Sure, we all know the feeling. "I just have to get the new iPhone!" or "I can't wait until summer! Winter is so.. blah!"
Have you ever talked to someone that's perfectly content? These people do exist, though they may be few and far between. No one likes the person that's constantly complaining-- so why do we complain so much?
Instead of complaining about how annoying winter is, find a few good things about winter. I.e. the beautiful sunsets, deep blue sky, hot cocoa, etc...
Instead of wishing you had something, make a list of the things you have that you couldn't live without.
A lot of times, it seems like we wish for something for so long, and then when we finally get it, it's not as good as we thought it would be. Or we realize that while we were spending all of our time daydreaming about this or that, we could have been spending our time doing something profitable.
Life is short--don't wish it all away.