I think the best general advice is to maintain, as much as possible, “normal” BG values. The more HYPERglycemia you experience, the greater the stress on your ß-cells to keep up. This control can be achieved through diet, exercise, aggressive (but cautious) insulin titration or a combination of these, and you’ll certainly hear any number of variations on these themes.
Also, I don’t know how frequently you are checking your BG, but I would try and develop a system (in conjunction with your endo, if possible) to use the novorapid and lantus adjustment to PREVENT those spikes instead of correcting them. I think you will likely feel better and experience fewer hypos.
Just my two cents… Good luck, and may your honeymoon be as long as possible!