Good move. I would give the following advice:
1) Try to increase your savings ratio once you move up the job ladder. Moving it from 6% to even just 10% won't cost you much and will make a *huge* difference for your retirement assets. Once you get a good job (e.g. 50k+), if you can save 20-25%+ of afer-tax income, you will become a multimillionaire.
2) Do not invest in mutual funds. Most underperform the S&P and it is practically impossible to choose ones that will consistently outperform. Instead, buy an S&P index fund with the lowest expense ratio, and a Russell 2000 or Wilshire 5000 index fund, again with the lowest expenses. Also buy a world index fund (to hedge country/dollar risk).
3) Whenever the S&P is down more than 10% and the media/public is bearish, try to increase your contributions.
4) Never sell
5) Avoid debt as much as possible. Even with mortgage debt, try to get as short a mortgage as possible (e.g. 15 years not 30) by getting a smaller place, and consider refinancing and paying it off as soon as you can afford to.
6) If you are in stable employment and are prepared to settle down locally, buy a modest house or apartment as soon as you can.
7) Never get married. If you want to have kids and think marriage is necessary, get an iron-clad prenup. If your fiancee hates the idea, find another one who doesn't.
8) Always carry up to date home, medical, unemployment, income protection, and legal insurance.
9) Once your 401k gets to 1 mill, start diversifying away from equities. Put say 10% into bonds & commodities, and increase the percentage as you get older. By the time you are 50 you should have maybe 40% or less in equities. Preservation of capital and income becomes much more important than return on capital.
10) Speak to a *competent* tax advisor/financial planner to go over the tax issues. There are benefits to having a good chunk of money outside government-regulated vehicles such as pension wrappers. It hedges your socialism risk (e.g. govt raids on pension money, inflation, tax hikes etc).
Those steps should avoid the most common financial disasters, and maximise your retirement assets.