When you next go to White Hart Lane, take some pictures or record a few video clips. Do it again next time you go. Do it every time you go.
Try to capture all the mundane, everyday aspects, not just stadium views. Lineups, people you regularly see, whether passing about the stadium or chatting with as you wait in line for food or drink, stuff that happens as you make your way to or from the game - pubs you visit, people you banter with as you line up for concessions. Skip the toilets, eh?
Photograph details. Seat numbers. The view down an empty row of seats where you normally sit. The texture of a wall. A view looking down an interior hallway. The view from the interior of a vomitory as you are about to pass through into the stands. And, of course, moments that occur during a match - turn away from the action and shoot the faces behind you. Focus on upraised hands celebrating a goal. Scarves held up or twirling.
Gather up as many of the little threads that form the fabric of a day watching Spurs in White Hart Lane. If you didn't quite capture what you hoped to on the first try, hopefully you have other opportunities to improve or refine what you capture or record. If you chip away at it, little by little, you'll have a wonderful document to refer back to.
You'll love yourself forever for doing this.
Because, no matter how wonderful the new stadium is, it won't be the same. In so many ways, it can't ever be the same. It will take years before you get back to the same point you're at now in terms of feeling familiar and at home. So start to preserve your memories and experiences now. I've been professionally involved in the transfer of major sports clubs from their beloved, historic homes to wonderful, new facilities.
I have friends or colleagues who can quickly get teary-eyed looking at images of the old hockey arenas they once visited - the Montreal Forum, Toronto's Maple Leaf Gardens, Pittsburgh's Igloo, the Boston Garden. Plus Detroit's incredibly intimate baseball ground, Tiger Stadium. They were all cosy, cramped relics, each with their own unique sightlines, distinctive shapes, nooks and crannies - full of atmosphere - yet they were constantly griped about for what they lacked. Eventually, those gripes spurred the building of new arenas.
The new homes are amazing places and serve each club well, but the old ones are now missed terribly. You still have time. Use it well.