Do you have any special rules/restrictions to regulate character advancement pacing?

[Boge]

It feels a fine line to walk, giving players a feeling of advancement without increasing too quickly. I recently played a campaign where I went from a sword skill of 16 to Weapon Mastery and sword skill 22 (DX+7) all within about 20-25 sessions. The campaign timeline was about a year and a half. Another player went from no skill to 20 (DX+7) with weapon mastery. That felt too fast for me.

I'm trying to come up with some house rules to keep a good pacing. Some of our play sessions have time gaps inbetween, weeks of traveling, a month of recovery, etc. Others go day by day, one day being one play session. So I think the advancement needs to be based on sessions rather than in game time. I'm thinking maybe a limit of 1 point per skill/advantage/attribute per session. But, I feel it should be more difficult once you reach higher skill levels. Someone DX12 with a skill of 13 should have an easier time advancing that skill than someone skill 20, but the Gurps rules are 4 points per skill up regardless of how high you get.

So, I'm just trying to sort though some ideas. Do you have any rules that help keep a good pace without things getting out of hand?