I just posted some basics, and will post here again too.  And timeframe depends on you. 

To start, the best thing you can do is ignore everything about your current situation that you don't like.  Don't analyze how things got this way.  Don't think about the past.  Don't relive past arguments or disagreements.  Don't wallow in any of this.  The way you don't give it attention is by ignoring it.  None of it matters, because it will change.

If you have a hard time turning off any of this, try to focus on silence in your mind.  This works well because sometimes thoughts of the negative spiral out of control and they are hard to stop.  Turn to silence first, then build on the positive.

Remember, positive thoughts are much more powerful than negative.

Next, you need to take steps to create what you want.  Our thoughts, actions and words are constantly creating our entire life.  We just usually do it unknowingly.  But, now you will focus exactly on what you want.

#1 Visualize
Take time every single day to close your eyes and imagine stuff you want.  Imagine it as if you would remember a memory.  Think of it in all senses.  And without any limits.  Imagine what you want to hear and experience.  Imagine it as happening now, not in the future.  Don't try to figure out how this stuff will happen, just imagine it happening and feel free and happy inside.

#2 Remote Seduction
This is similar to visualizing, but has certain techniques.  Here is the link:
http://www.powerlawofattraction.com/forum/6/remote-seduction/

#3 Prepare with props
Buy and prepare things that coincide with visualizations.  Plan for the things to actually happen.  Be prepared and ready.

#4 Listen to LOA lectures
YouTube is a great resource.  Or read books.  This will keep your mind flooded with the principles of the LOA which is no different than the law of gravity or the law of gestation which plants live by.  It's a science.  Remember how absolute it is.  You do these things to bring about the results.  It works every time because it's a science.

Letting go is often misunderstood.  You need to let go of fear and doubt.  But, always think happy thoughts about your desire.  Keep pictures up to remind you.  Listen to audio clips if you have them.  Stay focused and try to be happy in other areas of your life.  Think of your life as a perfect orchestration of your desire.  Because it is!

Imagine you just placed an order at a restaurant.  You know the cooks are making your food and soon it will arrive.  You don't doubt it and run back and check to make sure they are doing their job.  You just know they are.  Think of the Universe like that.  Because it's how it works.

I hope this is a good start!