SFGate

elklaker As you already seem to know, you have to get rid of a significant amount of "stuff". Start small. Trying to tackle the whole house will be overwhelming. One room at a time. Maybe start in the family/living room. REMOVE things. Do not just move to another room. Ask yourself "do I LOVE this or does it serve a real purpose?". If not, donate, recycle or throw away. If you have friend who can be ruthless (I made my best friend cry but she now has a beautiful, clutter-free home that she loves).
Once you clear out the space, post some more pics and we will be happy to help you on the design side. GOOD LUCK!

14thstreet Your investment in a professional organizer would be well worth it.

nikitasmom Good advice from the others. Another thing you could do is get all those photos scanned then put onto a digital frame. Take pictures of those precious momentos cluttering up your room to add to the frame then pack them up onto a top shelf, sell, or give away. Furniture that provides doors for hidden storage such as a buffet in the dining room where you can hide those cheetohs and put the coffee pot on. It looks like the living room could use another storage furniture piece but from the photo it is difficult to say what kind and where to place it.