Here's the catch, once you've let go, move forward. There's no room for looking back. Past is past. You can try reminiscing about the good times, but as much as possible, try not to. I realized that moving on becomes harder when people keep on looking back on the memories, be it good or bad. So better yet, stop. Just stop.
So how are you going to start moving on then? I honestly do not know. I guess that depends on you. If throwing memorabilia would make you feel good, then do so. If crying would lead you to moving on, cry 'til your last tear drops. If moving to another place will help you, then go. If meeting new people or having new activity will help you, just do it. As long as it will help you move forward, do not hesitate to do so.
But you know what's the best thing to do? Pamper yourself. You've read it right, pamper yourself! Indulge in whatever that would make you happy. Stop thinking about anybody else or worry about something, just enjoy. Be with yourself. Do not be harsh on yourself. Love yourself to the fullest! Fulfill your dreams, your heart's desires. ^_^