Making a Plan

[Sleepy Raisin]

So I got a gym membership but i can only go once a week until summer, but i've been doing pushups, planks, squats, and lunges lately but i realized i've been making excuses to get out of doing them.. Finally i realized, it's because i dont have a good plan for working out. I dont know how many reps i should do or anything..
So how can I make a good plan that will keep my on track?

[Aceso]

When you are at the gym, target your weakest areas and lift as heavy as you can.
Google 'Home exercises', or 'Calisthenics' for ones to do at home - maybe invest in some cheap resistance bands or whatever. There are a lot of different exercises out there.
Most people do between 3-5 sets of 8-12 repetitions. :)

If you want to get really serious, try targetting different muscles on different days. Working out every day will overwork your muscles, so try doing what is officially called a muscle 'split.'
Most muscles work in pairs (Hamstrings and quadracepts, chest and back, biceps and triceps etc.) so try and find exercises targeting specific muscle groups. My first split was something like;
Monday: Legs and Shoulders
Tuesday: Rest
Wednesday: Chest and back
Thursday: Rest
Friday: Biceps and Triceps
Sat & Sun: Cardio etc.

You can eventually spread these out and work each muscle group more intensely if you wish, but this was a good beginning point for me. Try googling different exercises for different parts of your body, there are lots out there. :) The split I had worked most of my main muscles, but if you want to train your core go for it - the exercises you are doing are all good ones. You can always try doing things like dips, different variations of pushups (Narrow, wide, diamond etc.) and if there's anywhere you can, pull-ups and chin-ups are good too. Always push to the hardest you can go, however the more you do the more you'll pick up on and feel comfortable with. Good luck! :)