The World is Not Enough referenced On Her Majesty's Secret Service. A lot.

Having just seen the former again and being a huge fan of the latter, here are the ones that I noticed...

This list is presented in the order that the references occur in TWINE

• There is a close-up of a bullet hole in a glass window
• The Bond Girl's father is curiously/unjustifiably on speaking terms with the head of MI6
• The first vehicle Bond drives is black and lacks a bulletproof windscreen
• The Bond Girl is a suicidal billionaire heiress with a dark and troubled past
• Elektra asks Bond if he ever lost a loved one. This is the most blatant Tracy reference of the Brosnan era.
• Bond and the Bond Girl go skiing. They're attacked, and end up buried under an avalanche
• Bond skis to the edge of a cliff and sends his pursuer over it
• The Bond Girl loses badly at a card game
• "People who want to stay alive play it safe."/"There's no point in living if you can't feel alive."
• Brainwashing (apparently) plays a key role in the plot
• The main villain cut off their own earlobe(s)
• "The World is not Enough" is stated to be the Bond family motto
• The Bond Girl dies from a single gunshot wound while wearing an outfit that technically covers her whole body but still shows an amazing amount of skin between/underneath the fabric
• Bond is clearly aggrieved by her death, and cradles her corpse afterward

(There's also a glaring continuity error in the pre-title sequence, but I doubt that was a deliberate homage: in OHMSS, watch the water level during the fight. In TWINE, watch the position of the hot-air balloon when Bond launches his torpedoes.)