+100 in the avoiding alcohol as Glandular Fever plays havoc with your liver in particular.
I was stuck in the house for about 7 weeks with it way back in 1983 and it's not something I would ever want to repeat, and it was over a year before I got back to what passes for normal. About 2 weeks after getting freed from quarrentine in the house I had a pint (at my cousins wedding reception) and was sick for about 3 days (I wasn't the food as I still wasn't eating)
Oh yeah keep away from anybody who is ill with anything else as it firstly it's easy to pass on glandular fever, secondly your body is hugely weakened (for ages).
Keep warm, drink lots of fluids and concentrate on getting better