Depends on the contract type: If it was a Raid I jump back to "friendly" territory for R&R, Garrison, Cadre Duties, Defend type contracts I stay on the planet for a while, find a new contract, look for personal and gear and burn some money on Dropship search.
I do think there is a bonus on the number of contracts offers if your are on a capital planet or mercenary world like Outreach or Galatea.