The two nissan dealers near me offer slightly different services at 60K.  I
would suggest getting the service menu from your local dealer.  IIRC, your
owners manual also lists a general guideline as to what should be done.

That said, the plat plugs are not necessary at 60K.  Nissan may suggest an
induction service in addition to what you have done.  They also will inspect
all systems and lubricate the chassis

What year Maxima do you have?

Regardless of that info, at 60k it would be worthwhile to change the
belt (both accessory and power-steering), fuel filter, PCV valve,
rotate tires, if you have a 95-99 Maxima, also change the plugs (use
NGK platinums, every 60k).

Other things things to inspect:
- Brakes
- Tires
- CV boots
- Tie-rod ends/steering boots
- If you battery is more than 5 yrs old, pop in a new battery (This is
just preventative maintenance IMO).

- Alignment (if the tires are wearing unevenly)

thanks that what i was looking for, i have a 2000 maxima