First, you'll want to reduce the time your browser takes to load the site, possibly by disabling anything you don't need, such as browser plugins, javascript, image loading, etc.
Assuming your own system is fast enough to deal with all this or you've disabled everything possible, then you can't actually do that much.
If your own internet connection is the bottleneck, then try plugging in a LAN cable, using a less heavily used network, or upgrading your plan with the ISP.
Otherwise, if the bottleneck is indeed with the site's servers there isn't actually much you can do besides help them out. Since you use the site so regularly consider donating to/paying the owners, so they can upgrade their servers. Given the dough they'll probably be grateful and more than willing to help you out here.