use lower texture sizes, run lower res effects,
also going forward with Direct Storage the smaller memory pool of the S gets a lot of help from the SSD. 6+GB per second load speed with direct storage should help load higher res textures when needed.
sampler feedback streaming additionally will help with only loading the parts and mips of textures that are needed in that moment.
current games will have more issues with the memory of the S than games down the line as all of the stuff that can shrink the needed amount of memory aren't really in use yet or only in rudimental forms