Getting enough dietary fat

I've got a small problem.  A vegetarian diet is already low in fat, and with the way I'm being very calorie-conscious lately (1300-1500 a day), combined with the fact that fat has a lot of calories, I've found that I've been struggling to get enough fat in my diet. I average about 10-20 grams a day, but I'm pretty sure I need to be getting more like 40-50.

I know that nuts and nut butters, as well as avacados, have plenty of good fats, but the thing is that they also have lots of calories.  I'm thinking I'll just have to suck it up and cut calories elsewhere to adjust and get the fats I need, but I was wondering if anyone else has run into this problem?

It's about creating a balance....  Yes, as part of a 1500 cal diet, 25 - 30% (40-50g) should come from fat... not that much at all really.  If you add an extra two or three teaspoons of olive oil to a dish for example, you can offset it by removing an ounce (dry weight) pasta or rice..... but then bulk the dish out a bit more with some extra vegetables so that it's more filling. 

Fat & protein make a meal more satisfying and slow down the rate at which the stomach empties. So even though you might end up eating less volume, it should keep the hunger pangs at bay longer.

Sweet deal, that sounds reasonable enough.  Thanks so much for your suggestion!

I needed to increase my dietary fat so I replaced my 140 calorie bag of chips for lunch with 1 ounce (170 calories) of unsalted almonds.  They are delicious and for some reason I go ALOT longer without getting hungry now that I'm eating those nuts every day for lunch.