I'm no expert, but I can tell you what my trainer tells me. He is a big believer in the right-cross counter over the jabs because so many other amatuer trainers train their fighters to throw tons of jabs. His son who he trains has a pretty good amatuer record, so I suppose he knows something. If you can slip well enough to the right and keep on balance, you may see some nice counter opportunties off a lazy/sloppy jab or double jab, with right over the top, especially in the novice where everyone is still polish their skills. If you can touch him hard the right hand counter early, it might take him out of his game plan and make him hesitate. Watch for him telegraphing the 1-2, slip/roll inside left and double hook - low then high. These things probably don't work on more advanced fighters who expect these counters, but in a novice fight where people throw a billion jabs and 1-2's you can be a step ahead if you've learned to slip and counter well, even just a few basic moves.

If you're not good at slipping...uhhh....throw jabs, do what Donny says.