I prefer 5 or 6 terms for the House so they won’t feel slighted in comparison to the Senate.
Also since we will always have “career politicians”, people who are so certain that only they can can make “hoi polloi” lives better. (That previous sentence is dripping with sarcasm if you didn’t notice!)
I say let the career politician who wants to make the Senate or House his “home away from home”. You can return but you have to sit out one full Senate term (6 years) & 3 House terms(6 years). Meanwhile “Mr. Career Politician” go home (Leave the DC area!) and run for mayor, county commissioner, governor, etc. Maybe even get a job in the private sector. Go find out what’s like to live under your past “political wisdom”. Who knows “Mr. Career Politician” you might learn something
Increase the house term to three years and cut the senate term to five. Maximum two terms of each. That's a total of sixteen years for the successful ones. Remove all pensions and benefits not available to ordinary citizens who do equivalent work; let them pay for what they want like the rest of us do. Make them subject to all laws to which other citizens are subject (e.g. Obamacare).
And for the final blow to the self-seeking, require that all political contributions be ANONYMOUS. They can't sell influence if they don't know who is buying. Americans should be permitted to donate to any candidate or party, in any amount they choose; that's FREEDOM. But being able to purchase an outcome with a donation is BRIBERY, a CRIME.
Those steps will result in people who are willing to forego ruling and SERVE predominating in congress.