The 401k plan is something every employee, union, non-union, management, or whatever, should be in. When I got in it took me about a year to work up to having the max % withheld and at first it was tough but years later now I don't even think about it. Don't waste another moment if your not in. Get the paperwork right now and get going even if you only can withhold 1%. That's better than nothing at all.
For you union members, our 401k plan has a self-managed portion where you can buy individual stocks and also select from hundreds of mutual funds. I love this part especially right now because with the market down you have the opportunity to buy good companies for the longhaul. Don't get greedy but set your portfolio foundation up with good solid companies that are there for the longhaul and then once you've built up a little "house money" then gamble on some high risk stocks. JMO.