/diy/ - Do It Yourself

You guys got any tricks for making a perfectly square frame with just a handsaw and a drafting triangle?
I'm making another card table like the one in pic. I'm happy with how the first one came out except the corners weren't totally flush (I filled the gaps with glue so it's passable for an amateur job) but I want this one to be nicer. The table will be 4'x4' so it should be easier. Should I use sand paper and trial-and-error? My only power tool is a drill.