neutral paint is the most expensive paint. OOPS! Paint is the cheapest! Every home depot and lowes has gallons of paints that were mixed incorrectly for the customer so they sell them for $5-10 a gallon. Sometimes there are full 5 gallon buckets of oops paint too. figuring out creative ways to use these paints can pay dividends. While neutral paint is rule of thumb, properly done colors can add pop and a higher end feel to a property.
Appliances depends a lot on where you are and how nice the units are but yeah, if you are trying to get higher rents, stainless certainly gives the higher end look. I also think nice backsplashes add great pop to a kitchen for short money. redoing bathrooms are great bang for the buck reno's as well. IF you have linen closets which negate the need for a vanity a nice looking pedestal sink can add a nice look and keep costs way down. new tub is $125 and tiling a tub surround can also be done pretty cheap.
fully agree with throwing out dirty blinds and putting in new ones, they are pretty cheap