Most expensive areas are kitchens and bathrooms. So in the kitchen, restore or resurface cabinets. You can replace doors on cabinets far cheaper than new cabinets. $70 for doors (any size) and $45 for drawers (any size) at kitchenreface.com. You can also use Corian counters instead of granite but depending on the price point you're selling at, you may need granite. If so, go with a lower quality granite or pre-fabbed granite if your space can accept that.
In the bathrooms, if tile is standard and in good shape, you can glaze the tile. Same for the tubs. Glazing is far less expensive than replacing tile and tubs.
You can go with laminate instead of glue or nail down hardwoods. However, get higher quality laminate that is thicker than cheap laminate. It will last longer and look/sound better.
Salvage as much of the yard as you can and replace only what is necessary. Shouldn't compromise on curb appeal but you can make some smarter choices and by doing the work yourself, you can save with sweat equity.
