Holidays in Agnac, that can be: enjoying in the sun, being lazy ...
Having time for one another, family, kids, friends ...
But there are plenty of other possibilities, it all depends upon
your interests :

An active, sportive holiday :
swimming, hiking, cycling (bikes for rent at 5 km), kayak on the
Dropt or the Dordogne,
horse-riding, playing golf, etc.

A culinary exploration :
famous vineyards (Monbazillac, Duras, Bergerac, Bordeaux),
the original area of 'foie gras' (fat goose/duck liver), the
Perigord...
Agen, known for its dried plums ; other local productions (fruit and
vegetables) and oysters,
all of this to be bought directly from the producer on the market
every Monday and Thursday.

A cultural expedition :
well-known grottoes (Lascaux, Fontirou, Lastournelles, etc.); a
prehistorical zoo and open-air museum...
the "bastides": local type of village implant/architecture; castels
(Monbazillac, Duras, Lauzun, Bonaguil, etc.); medieval towns and
villages : Bergerac, Sarlat, Issigeac...

Discovering Southewestern France :
its rivers and valleys: the Dordogne, the Lot, the Garonne
going West to the atlantic coast (Arcachon, Dune of Pilat);
Bordeaux; the pine-tree area "Les Landes".
going South to the Pyrenees: might be an idea for another one-day
trip
going eastwards : Toulouse and Carcassonne, Albi, the land of
Cathares, etc.
or North-East to Rocamadour, a village built on a rock ; the Padirac
cave for an underground exploration.
Lodging in Agnac, you're at reasonable distance for plenty of
different types of discoveries. Start planning...