Every guy should have a circle of close female friends. Now I am not talking about a group of girls he hopes to nail at some point soon; I am talking about women who he can be totally open around without worrying how it might impact his plan to get laid in the near future. Having some good female friends can really come in handy for a variety of situations. It's not a coincidence that most gay dudes have a ton of female friends, and those guys are usually the best dressed and best groomed.
Real advice about women
Sure, getting another guy's perspective can be helpful, but let's be honest women and men have very different thought processes. So going to someone closer to the source, like another women, is probably your better bet. Tossing around gift ideas for a new girl you are dating, trying to figure out what restaurant she might like, or what kind of flowers you should send. You think one of your dude buddies is going to be helpful in that department? Probably not. Well, unless you're friends with me, of course.
Shopping for clothing
Some guys really like shopping, and some guys hate it more than anything, but in either case they can still be buying the wrong clothes. Sure, you could chat up the sales girl, and that might be a great way to get a date with her. However, at the end of the day she is still trying to sell you stuff, so you're not going to get an unbiased opinion. Next time you go shopping, take a female friend along. You can try things on and she can give you a real female's opinion. You can even return the favor by helping her pick out some items her next date might like.
This is an important one. Having female friend who like and trust you is a great way for other females to see that you're a good non-shady dude. Whether your female friends directly try to set you up with other girls is besides the point... just hanging around with a few girls casually at bar will show other women that there must be some reason they all want to talk to you.