Hi .... sunny
if you have two days for your jaisalmer trip
day 1 ----- you can spend you day to explore jaisalmer fort , along with some beautiful Havelis, like patwon ki haveli, salem singh haveli etc. these haveli s quite close to jaisalmer fort. & at the evening you can go to gadisar lake for sunset.
day 2 --- you can hire a Two wheeler bike, scooty, etc. you can go for kuldhara village, and sum sand dunes. which is around 40 to 50 kilometer from jaisalmer. deserts area like sum sand dunes is must if you are in jaisalmer. see sunset there & come back to jaisalmer