Clean your ride regularly- There are many degrees to cleaning. It isn’t spring so so don’t worry about the deep cleaning at this point. (That is why you have a bike shop do a tune up every six months) This would be superficial cleaning of the frame, but more importantly the moving parts like the chain. Degreaser is the key to cleaning. The places to get would be the chain, derailleurs, cassette, sprocket, brakes. brake and derailleur cables and your pedals. Follow the next step after cleaning.
Points that need to be lubricated- the chain in a no brainer, but what about your bottom bracket cable guide? Where is that located and why does that matter? If you lift up the bike you’ll find the bottom bracket and mounted under that are the cable guides. Can you imagine a place on your bike that would be as exposed to all the mud and water? This simple place to maintenance will ensure that your derailleurs work properly which make it a whole lot easier for you to go anywhere. Lube the moving parts that you just cleaned off but be sure not to leave extra lube on there because it is a magnet for dirt.
Tighten things up regularly- How do you think boat captains would keep a tight ship? We would never want it to ever to be true if someone accused you as to having a loose nut. There are plenty of parts on the bike that can be maintained or tightened regularly and are painfully simple. It is true that for parts like the derailleurs the tension really matters but bolts on the chain ring done matter. I had an experience where I was on a ride and climbing a hill I shifted into the smallest chain ring. Needless to say it didn’t work. After the ride, come to find out, that all the bolts except for one had fallen off the chain ring and I had never noticed. Keep a tight ship so that you can set sail at any time.