The #1 way to increase milk levels is to breastfeed on demand, with lots of skin-to-skin contact. Spend a weekend or a few days lounging in bed with baby, latching whenever possible. Drink lots of water, take in enough calories. Avoid unnecessary medications, especially anything with a decongestant or antihistamine in it, which are notorious for drying up milk supply.
If you need to pump because you're away from baby, it's better than not doing anything. But latching the baby is MUCH more effective than pumping ever can be when it comes to milk supply.
Fenugreek may help, but is unlikely to do so alone. Particularly if it's the dried version. The best herbal aid I've found is a tincture (I personally recommend the one from Kerry's Herbals).