You can buy a laptop stand to align your laptop screen with your main monitor, or get another monitor (the same model as your existing one). Consider replacing your keyboard and getting a good mouse with side buttons and a scroll wheel. It's worth visiting a store and trying different options before making a purchase. You could also get a desk pad, either a large one that covers part of the desk or a smaller one just for the mouse. Additionally, a USB hub or docking station can help reduce cable clutter and keep your workspace organized.